Bitcoin Forum

Is it safe to keep your all crypto currency at a single exchange (bitfinnix)?Or one should choose multiple exchanges.

It is not suggested to keep or store your coins on any exchanges sir. They might shutdown their platform at any time and your coin is at risk. Its better to keep your coins or tokens on a wallet were you have the control for the private key.

Yes, this is very true. You shouldn't keep any coins on the exchange unless you want to sell quickly for short profit on the same day or next couple of days. But even for day trading purpose don't keep all your money in any single exchange to avoid sudden losses if exchange goes into some trouble.

If you're buying coins for long-term gains then better move to desktop wallets and keep private keys or seeds safely so that you can access your coins in future to sell at higher price.

Yes wallet offline has excellent security compared to most exchange. when we save the coin in exchange then we can not fully get the guarantee because the exchange is a third party service so everys moment we could lose the coin we have. Until now maybe only a few exchanges that have good quality that is like bittrex. But still only the offline wallet that can give us the best guarantee.

The exchange can close at any time.
Either be hacked by hackers.
It is better to store on your hard disk and have several copies of backup data.

depending on how long you will hold your coins, if only for the short term does not matter you save it in the exchanger, but if for the long term this is very dangerous, because it could be exposed to the hack or close the sudden then your money will be lost, save your coin in the wallet that you hold its private key

Only store a bit of your coins of you actively do trading. If not, then there's no reason for you to leave them there. It's called an EXCHANGE for a reason, not a wallet. Better yet, purchase a hardware wallet like Trezor[1] and Ledger Nano S[2].
Read: Topic: [General] Bitcoin Wallets - Which, what, why? (https://bitcointalk.org/index.php?topic=1631151.0)

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[1] https://trezor.io/
[2] https://ledgerwallet.com/

Diversity is the key. So it’s better to put your crypto in several exchanges.

It is never safe to store our crypto currencies in exchanges because you are not controlling the private keys and the crypto currencies are only safe if you keep them in a wallet with private key access,but still there is no wallet available which can store all the crypto currency at one place but we have multi coin wallet which supports most of the reputed coins for now.

I know it is easy to handle all crypto on single site, but it is not recommend according to my view, even I prefer all in one exchange, but I made 5 or 6 exchanges for myself, knowing the fact if that particular site hacked or anything unwanted happened, I loose all my cryptos on one day.  So, it is not better to make at least you desired multiple exchange and store all your valued crypto at different exchanges.

It's generally a good idea to store your Bitcoins in a wallet where you control the private keys, rather than on an exchange where they control the private keys and could go out of business or be lost. But different wallets offer different levels of protection. And different exchanges offer different levels of protection. Some wallets include peer-to-peer trading functionality today. And, in the future, some exchanges will offer decentralized trading so that you can trade directly from your wallet and private keys that you control.

The best thing to do is to store your coins on a hardware wallet, but if u haven't bought one yet, i would divide my coins up in different exchanges. Also, make sure to have 2fa enabled on every exchange, and write the private key down a piece of paper.

In my opinion that too risky because when any bad thing happen with that exchange your all money at risk. For better use minimum 2 different exchange to be more safe. My personal, I used 6 different exchange so i can left my money there without any afraid.

Exactly, we need multiple exchanges in order to secure our investment because owners of the company should provide some hardware wallet with private in order to secure their coins in the wallets. We need more exchange in order to divert our money to different exchanges.

I think the multiple exchange option is good like if we have  a variety of exchanges then we will have different options like if we want to use a fast exchange or we can avail the important features of many exchanges So i prefer to use at least 2 exchanges for transactions and many other things as well. If we check the benefits of crypto currency then the exchange is important for us and i like the YoBit.Net exchange for transactions.

Just keep small amounts in multiple exchanges for trades etc as you dont want to store all your crypto in exchanges and risk the chance of losing it, then as said above buy a hardware wallet (ledger/trezor wallet) I personally own the ledger, its great and so easy to use but most of all I have control of my private keys :)

It depends on how active are you in trading, if you do day trading then it is okay if you will keep your cryptocurrency in a trusted exchange to avoid having too much transaction fees but never use an exchange to hold huge amount of coins for long term investment, it is better to have a hardware wallet or a paper wallet for that. I can't see the point of using multiple exchange to hold all your cryptocurrency, it will just increase the risk because you don't have a full control (private key) with those address that you use in exchanges, only use multiple exchanges if you are planning to do arbitrage trading.

never rely on single exchange,because no one can tell if they are trustworthy enough or will come closed in future,some exchanges had beed closed lately and this is what we aware because our funds was on them.and the things might happen to them has an affect to us.so better spread your funds in many exchanges for securitu

Exchanges platforms are made not to store coins there, but only to trade on , so for your coins safety , it's recommended that you store them in wallets ( unless you want to trade / exchange 'em ) which are more secured and their basic goal is to lay in cryptocurrencies.

It's definitely not safe to keep money on Bitfinex. They got hacked in 2016 and they forced all their users to eat some of the losses. They also claim that Tether (which they control) was hacked.

I would steer clear.

If you believe that the exchange you’re storing your cryptocurrencies is good, then there is no need to worry. But one thing for sure is that one shouldn’t store their wealth in one place, you should practice diversification, cause it would help you in a lot of ways. And it will also make you feel safe, cause you’ve got back up. If anything happens to one, you’re sure you didn’t lose everything.

Ok , I got your suggestion , so  it is better to diversify your holding among various exchanges , I hold it on bitfinnix , can you suggest me more reliable exchanges .

Depends on your main purpose. If you are a trader who like to do day trading, so storing all your coins in one exchange is the best option as you will save some money for tx fee but if your main purpose is for long term holding then storing it on your own wallet (cold wallet preferable) is the best thing to do.
Always bear in mind that there is always risk to store our coins in exchanges, so be careful and be wise.

It will be nice to have your coin listed on one single exchange. It will be easier to trade and not roaming about on the internet in order to trade all of your coin at the same time. Mind you, there is no point keeping your coin on any exchange except those coin you are actively trading.

It is not safe to store your coins on exchanges for a long period of time. Better to use multicoin wallets like Waves or Coinomi. Also, there are too many coins and tokens out there so it's impossible to find an exchange which lists all of them...

It is not advisable to keep your coin in some exchange sites. It is best to get it back to your wallet if you will not undergo trading. Since there are circumstances that you can't predict. Specially shut down or hacking events.

It is not safe! I read many circumstances of users having a hard time withdrawing their coins at a specific exchange. They have contacted the supports but still unable to withdraw their coins. Another thing is that there is a chance that the exchange you deposited your coin into might get hacked like what happened to other exchange. Also, why do you need to store yours on an exchange? Wallets are created for a reason you know, you have a complete handle on it because you are the only one who has the credentials over it unless you make a mistake and paste your private key when applying to any bounty campaigns.(Typical newbie's mistake).

Whether it is bitfinix or binnacle or bittrex but I would say it’s not worth keeping all your crypto currency at one place. I mean ask yourself why would you do that in the world where any exchanger can get trouble from the local authorities as can be seen with major exchanges in the past. They were literally shut down by the government and there was no clue to investors of that exchanger. So you might loose your money because we don’t know whether the exchanger will give us money or not. Apart from this hunk of the different scenario where your own account credentials got hacked and if you lost every dime of token in single shot then what would you do ? So that’s how you should think about it and spread the money across various exchanger or the best way is to get yourself a nano ledger hardware wallet and store it there.

Well I suggest that if want to keep it you should atleast go and be updated with the value of any token you earn or a coin than that the time when the value gets big go for it yo go exchange it of an ETH or BTC, but you should also be up to date everday with this ETH and BTC. Instead if exchanging it to ETH or BTC and keep it that way I will exchange it for my local momey country.
Yup this should keep on mind that when you earn coins from different wallets you can be in danger as well of keeping it a one wallet with an money a million so let get this straight. If one wallet earns a thousand or a million use another wallet

THIS IS A SUGGESTION A BEST WAY BUT IF YOU ARE AWARE OF HACKING go now and keep it in a vault or a bank.

TIP for you


1. If your campaign suggest a diffferent wallet and you go make one well if you earn money in that wallet please send it to the wallet you use and that is a wallet for all coins

2. If you feel you got a lot of coins well well go and get it out in the real world.

you are absolutely right .I have faced the situation when I was unable to sell my holding at zebpay .because their app was not working properly and the price of BTC was going down .It was panic situation for me.

As long you can protect your account it will be safe but most of us will not recommended that. Everything could happen and maybe you already hear exchange has been hacked, if you put all coin into one exchange it will become disaster, lost all asset in second. Safe your coin into wallet ( MEW ) is better but never share device with others. Just like that and have a nice day.

A wallet. Cold one.
Qt wallet for altcoins that have it.
Myetherwallet for ERC20. Dont store anything at an exchange if you are not going to trade anything.
If something happens with your coins, loss or cut then it will be a problem to contact customer support.
Every exchange will take days to answer or fix it.

I think there's no exchange with all coins in it because there are alot of coins in crypto and it will be difficult to add all the coins in a exchange but it's possible and one of the most coins in a exchange i think will be binance.

A decentralized exchange that will store your ERC-20 tokens in a smart contract is a start. That's far from completely safe, but certainly safer than storing them on a hot wallet in a centralized exchange. I know a lot of suggestions here are to put your tokens in a cold wallet, but the reality of crypto is that sometimes you need access to your funds INSTANTLY when a certain news publication or market movement takes place, and you need to do your trade within seconds, not minutes. For this reason I recommend decentralized smart contract exchanges.

It is not better to make at least you desired multiple exchange and store all your valued crypto at different exchanges. It's generally a good idea to store your Bitcoins in a wallet where you control the private keys, rather than on an exchange where they control the private keys and could go out of business or be lost

After shutting down they will tell they got hacked but this news is right or wrong we are not sure just we have to accept it and keep quiet. end of the day we lose our coins So don't take any risk keep your coins in your personal wallet and store your private key in personal hard drive or take a print out and keep it in your secure place.

This is not possible that you will get all the cryptocurrency in one exchange. Because some exchanges have set their own rules and regulations. As, you know Bittrex only listed the coin which are highly traded and that Kucoin also adopted the voting mechanism for the listing of the coin. If later some blockchain based exchange comes with the extraordinary feature to keep available all the crypto under one roof then it will be good for the trader so that not to open account with all the exchanges.

No, it is not safe you should never leave your money in an exchange for a long period of time only leave your money there as long as it is needed and only deposit the amount of money you are willing to trade, using multiple exchanges is not really a good option either, you need to have your own wallet and you need to be the one in complete control of that wallet, remember if you are not the only owner of your private keys then you do not own any coins period.

that is the big problem with day trading , you have a lot more risk if you keep your money in one exchange . but more exchanges means more fees and that means less money made . the safest thing to do is to divide it over multiple exchanges . and try to do your research on them and keep up on news about them.

Well if you're simply holding, yeah it's highly advusable to get yourseld your own wallet. Its a prerequisite for trading. Now it also wouldn't hurt if you make an account in other exchange sites and diversify your portfolio there since you'll never know if something will happen to bitfinnex

It is not safe to put all eggs in one basket, it would be exchange, coin, wallet whatsoever, You should not hold your coins in exchanges in the first place, just use them for trading and don't hold much in them.

Why you keep it in exchange wallet? If you have hardware wallet or safe wallet such as MyEtherWallet. No one recommends to keep your tokens or coins in your exchange wallet instead they advise you to transfer it to mpre safe wallet I mean your own wallet. If you really hold for long terms so what's your reason to stay in wallet exchange better to transfer it in your own wallet.

For holding first exchanges are not recommended at all. Keeping the fund on exchange when you are trader also moving that coins to your private key secured or 2FA wallet all the time.
If you are exchange cum wallet. Coinbase is there in the wallet list they would not give the private key to access.

they always say exchanges aren't your bank!
even Myetherwallet says that when you first go to the website ,It gives you the private key though!
so better just keep the amount of money you want to trade with , keep the rest of it somewhere safer.

You plan to hold your coins and it's a erc tokens? If yes then it's recommended to use MEW because if the exchange will compromised there is a chance your coins will also be lost.

It is actually dependent on what coin you're trading with. If you are trading with NEO and neo is not available FOR EXAMPLE at Cryptopia, then trade on Hitbtc or in bittrex. It is dependent on that.

This is to risky for me because now many exchange has issue with hacking, so for the better use minimum 2 or 3 exchange to be more safe and use all security feature in that exchange. And other more thing always login from bookmark link because there also many phising link, use privasi email address and 2 factor authentificaion. And if you have plan to hold any coin much better keep it in personal wallet, that will be more safe.

No exchange can guarantee you the safety of your money. Therefore, my advice: divide your deposit between several exchanges. So you can diversify your risks. Do not store all eggs in one basket.

That's the first rule in trading, always diversify and I think it can also use in exchanges since we can't tell that every exchanges are safe. Though some people are still holding atlcoins in one exchanges but its too risky to do so, you'd better to decide on what is the most convenient for you.

Yes do not stay in one exchanger because there are differences in every exchanger on where can give you a profit or a loss if this exchanger shut down. It is good that you have an account in any exchanger because it is an advantage on where you can gain a profit because of arbitrage.

No! not a good idea to store your coins in an exchange since you do not hold the private key, once the exchange have been hacked or experiencing problem about your coin, you will not be able to recover that. Only deposit those coins if you are going to trade it

But this is the way many are using exchanges, they are using exchanges as their banks and we know how dangerous that can be, exchanges have all the same problematics as banks they have full control of your money and until you get that money under your control then you are subject to their regulations which is something that bitcoin wanted to avoid in the first place, so unless people begin to think more about why bitcoin was created instead of the money they can get with it we will keep having people using their exchange wallets as their personal wallets.

Like many many people are saying it's not generally safe to keep coins on exchanges.  I don't think it's that risky to keep a small amount on a few of the better exchanges for trading purposes.  Just not the bulk of your holdings.

Unless you are going to trade  don't leave coins on exchange, especially on single exchange, it can be hacked or can go down anytime.
Best rule i have learned and I always follow - not to put all eggs in one basket. 

Is there any wallet that can store all the different altcoins?

Well if you are a trader that have a lots of time to monitor your holdings and you are trusting the exchange that you are using, then for sure you already understand the risk of placing everything inside one exchange, traders always take some time to read information and they will do everything to secure their assets, so risk will be lessen if you have those characteristic being a trader before making a decision to place everything inside an exchange.

Ohh, don't do that ever. You shouldn't keep all your crypto at exchanges. Keep them in your wallet if you want to hold them. Only put some of it on exchanges for trading. And try to diversify your exchanges.

Most people correctly advises not to keep your crypto on the same exchange (though it is better not to keep them on the exchange at all).

However, if you are just starting out and using a small amount for your trading, then, of course, it's easier to keep them on one exchange until you increase your capital.

It is good to have accounts on multiple exchanges. Because different exchanges come up with different process as well different limitations. We don't know what will happen with the exchanges, because often exchanges encounter hacks. So having it on different wallets won't let the user loss everything even when something goes wrong with the exchanges.

As others said it is not really safe to store your coins in an exchange specially if you have a large amount of it. Just keep 20%-30% of you coins if you an active trader. If you are a long time holder it is safe to keep it in your wallet.

Even reputable exchanges like Bitfinex Binance etc can be hacked. These exchanges should work on their security but i do not hear any news that they are doing something about it.

If you are a day trader it is okay to stay your crypto in an exchange. But saving it long in an exchange is not really safe. Better used hardware wallet or ledger to store all your coins for you to be safe and not to be a victim of hacking.

I am not much aware about hardware wallet.But I have enabled 2 factor authentication.So please tell about hardware wallet.How does it secure crypto currency.

no dude it is extremely very risky to store your coins on an exchange, you are asking for storing on one exchange, don't store even on a single exchange. Always store your coins in a wallet (Desktop, Hardware ) for which you are only in full control of your private keys. On Exchange, your private keys are held safely secured by them , but still, it cannot be trusted due to many reasons like may be the exchange shut down due to Government pressure or exchange is hacked, because nowadays many hackers out there are targeting crypto exchange like you have surely listened about etherdelta exchange hack. Yes, if you are a day trader then you may store it but not all your coins only that amount of coins you wanna trade rest keep it in your wallet.

Nothing is safe. The risk is connected with everything in the crypto world. We are all trying to preserve the safety that we are slowly acquiring through new antiviruses and backups. Exchanges have their own security measures but even that good measures ( especially in bitfinex) cannot be relied on.
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Something unexpected can happen to exchange - hacking. the closing of the exchange, government influence and when that happens if you have everything stored on that exchange no one is guaranteeing you that your portfolio will be restored. Be smart and split your portfolio between exchanges.

It not safe to keep all your crypto currency on exchange site. Besides, not even an exchange that was hacked on August 2016 and I will advice to get a hardware wallet to safe all your crypto currency while you leave some on exchange for trading purpose.

Offline wallet can guarantee your fund would be very safe but its not very usefull regarding to trade our capital.
Saving in offline wallet is not suitable for us as trader who want always trade at any convenient time so split our fund and use both platform would be more suggested.

I agree. Also, if you keep you coins on exchange, you might not get access to forks. Also, if you ivest to ICOs, you have to invest from the wallet where you have the private keys.

Are you still holding your crypt money in exchange wallets? This is very risky. Hold your cryptos in your own wallet if possible. Otherwise you can be sad.

Its absolutely not suggested to keep all of your money in one place, especially that place is exchanges, exchanges got a bad reputation for storing money, where people unable to withdraw, suddenly closed down and being hacked, so its absolutely dangerous to keep your money on exchanges, exchanges is not a place to store your money

This is a huge mistake that many keep doing, using exchanges is inevitable if you are a day trader but if you are a holder you do not have any excuse to keep your coins there, think about it lets suppose you have 1 ETH it is highly unlikely you are going to be targeted specifically with that low amount of ETH but if you have that amount in an exchange your crypto is at risk since exchanges are big targets that hackers will love to steal from and if they are successful there is a big chance you will never see your coins again.

Most important rule: Try to split and minimize your risks. Keep some of you Crypto on different (!) exchanges and some on different (!) wallets. If an exchange gets hacked or one of your private keys stolen, you won't lose everything!

think All crptocurrency and a single exchange better, because it is even more secure. it's accurate. thanks.

You shouldn't keep your crypto on both single or multi exchange although it's the best crypto exchange cause when you keep your crypto on exchange that mean you can't totally control all your crypto like when you keep them in your own wallet which you can easily control private key. If you keep your cryptocurrency on exchange, when these exchanges hacked that mean all your cryptocurrency also hacked as well :).

It's not safe to put or keep all crypto at a single exchange, what if their exchange site was corrupted all your crypto is affected and have possible to loss your token ( almost all successful said, don't put all your eggs in one basket. ) Anyways, much better to keep your token/coin in your own wallet that have a private keys to secure your crypto and sell if you want to sell it.

It is just giving all your efforts for free, better have trezor or ledger if you want just to collect them all. But pitting it in one exchange, never, when that exchange shut down you'll soon regret not, spread it to the trusted exchanges the stricter the better.

It is also safe to store your cryptocurrency in exchange for you to enable a trade right away when these coin move in an upward trend, but somehow when you store all your hard earned crypto in an exchange it is very risky, because anytime the exhange platform could be corrupted or get hacked.

Use your wallet. Dont use the exchange as your crypto wallet. You will regret it.

I am not sure if it really safe but most of i read or advice is not to do it. We already knew that there are some exchange are being hacked and lost most of their coins. Or there are some error or bugs happening that compromised our tokens. Maybe it will be return to you but for a long period of time and it is really a hassle. (especially if you really need those at the time of emergency). Traders sometimes need to store their cryptos in exchange site especially if they are doing a long term trading, but as soon as you get your desire amount you should withdraw it immediately.

This is what i thought because saving longer time in exchange will be much more dangerous and suitable for long term holder.
Exchange wallet is just for day trade or short term who can really easy to sell their coin at anytime.

The strategy of keeping your coins in different wallets is correct but the strategy of keeping your coins in different exchange wallets is a mistake only keep what you need to trade in an exchange all the rest of your coins needs to be under your full control and no one else you need to have control of the private keys of your addresses, if possible use a hardware wallet or a paper wallet to store your coins and if you could keep those in a safe then that is be even better you do not want to risk your coins to be stolen in the old fashioned way with a person just taking your hardware wallet or your paper wallet from your house.

Try to not keep your coins or fiat on exchanges as much as possible or distribute them more than one exchange if you need

If you are a regular trader you can store your crypto asset any trusted exchanger like as bittrex or bifinex or kucoin.But you want to hold your crypto asset you can use a different desktop wallet or official wallet not exchanger.Most of the people lost their asset for using untrusted bt profitable exchanger so you can easily use desktop or official wallet and keep your private key any safety place

Cryptomarket are being attacked by the hackers so this mean that holding huge amount of coin in an exchanges are really not a good idea. Better to put your holdings on a hard wallet to prevent any of this, just trade the amount you can afford to lose.

You said long term is dangerous and i think its not all long term dangerous.
The lack of exchange can be replaced by storing in wallet which has higher security since exchange is very risk for longer time holding.

Don't ever consider to store up amounts on any exchange. Single or multiple exchanges its not really advisable since those are just 3rd party wallets which you don't have the full possession of your coins.Its much better to use up your own wallet when it comes on storing up your coins and only pass up the tokens that you do trade. Might be time and fee consuming but much more safer in terms of losing out money when exchange can be potentially hacked.

Never heard bitfinnix before, is it a local exchange in your country? or a global trading platform? maybe it refers to Bitfinex?
Most people will say don't do that, because some exchanges ever got hacked, and your coins will be gone as well.
Exchanges meant to be a place to trade cryptocurrency, not to keep it for a long-term, just deposit, do your business and get out as soon as possible.

The idea is not holding the coins in different exchanges,if you are not trading at the moment,make sure you moves the coins out the coins from the exchange and hold in your own wallet as you never know what will happen to your coins if there is a breach in the exchange,so make sure you are always on the safe side,i only send the coins to any exchange when ever i feel like trading .

I think it is better to keep all your funds or coins in a wallet not in the exchanges because sometimes coins are being delist from the exchanges when they are lack of support.

It will be your worst nightmare if something bad happen to that exchange. You have to be resourceful enough to spread your assets. We know that exchanges can't fully guarantee to trust their security from hackers. Best thing to do is to have multiple exchanges just to be safe.

Its better to keep them on your wallet, its much safer. Exchange are open to all who wanted to trade and ofcourse its also open to those who just going in there to scam. Its not that safe. It can be hacked because of its not so secured facility. If that exchanged gets some glitches, virus, or anyrhing then your coins will say goodbye to you. Its better be safe than sorry.

I think the bittrex is here for you to suggest it because the bittrex has a lot of crypto currency.

You can look at the coinmarketcap.

It is a very big mistake to keep all your cryptocurrencies in a single exchange, you are taking a huge risk if your account is hacked you will lose everything you have work hard for, if the exchange is hacked then not only your coins are at risk but the coins of thousands of users so only keep what you need to trade in an exchange everything else should be in your own wallet under your control.

1st of all keeping your cryptocurrency in exchange site is not safe, in that if you keep your all coins in one exchange site it is a big risk don't ever do this mistake. if the coin does not have personal wallet then you can keep those coins in exchange site but not all coins.

 for now it is imposible to have a single exchange with cryptocurrency in it, even if the big exchange is incomplete of all coins. but i hope in the near future they build a very big exchange that hold all the altcoins and even ico in that exchange.

even you're separated your funds into different exchange i think this is risky too because if those exchange got hacked then you would never get your money back and just use exchange for trading and don't ever save your funds to them although there is big exchange but it will not guarantee they will always be legit

Yes, of course, it is safe if you really feel safe while trading them and holding them in your trading account. Well, i personally have used many trading exchanges till now and i always prefer to go with the exchanges which has a high amount of security and which provide us many trading coins with greater price and volume in numbers and with good transparency. I always go with the exchanges which provide us good and quality service just like Bittrex, Binance etc.

It's generally a good idea to store your Bitcoins in a wallet where you control the private keys, rather than on an exchange where they control the private keys and could go out of business or be lost. But different wallets offer different levels of protection. And different exchanges offer different levels of protection. Some wallets include peer-to-peer trading functionality today. And, in the future, some exchanges will offer decentralized trading so that you can trade directly from your wallet and private keys that you control.

exchanges are not wallets
If you are not holding the private key of your wallet means you have no control on it!
exchanges are just for trading not holding.

Although Bittrex have such an amazing amalgamation of coins and new technical analysis that gives you best performance of your coin. Still it is not better to force out all your coins on one exchange until and unless it is much more satisfactory to you. Like Bittrex, there are so many exchanges as well but as far as I know, if you want to take such risk, only Bittrex would be of some help.

I think I might suggest you multiple exchanges because if you are wise and smart you can think that they will provide you real security and total exchanges,  I think no.  Find another exchanges as you will feel another savings because if you just stick to one it will possibly shutdown and all of your coins will be lost like a bubble in just a microseconds.

No doubt that bitfinex is better exchange , even in these days most of the cryptocurrency exchange are better but in reality I would like to recommend you for the store of the cryptocurrency at multiple exchange Because if you will put your all the cryptocurrency at single exchange then there is chance that if the exchange get hacked or anything happened wrong for some time then surely your all the cryptocurrency get stopped to progress or send or receive and in that case everything that you will have wiop be useless .
And also if you will use multiple exchange then surely there will be another thing that is a type of differences in the price of the coinn from exchange to exchange and in that case you will be able to make big earnings .

Will,in my own opinion its nice to have a one single exchange in one  trading  exchange site,and all you needed coins all is there,because youn can assure that you will never been mistaken when you were doing your trading transaction,because thats everyday what you always doing,because as far as i know every exchange trading site have different policy and standard,when you done mistake in your transaction they never  interfere your trading,so thats why im favor of one single trading site,but there is also a negative outcome of this,if those trading site will become abusing its markets caps or transaction fee,because there is no competent in there bussiness.

It depends on the coins you're trading plus the amount those trading sites buy them for and the rate of transaction as well. Every site offers a different price point for every coin, some sites may value one coin higher while others see it as not that much, therefore, I would say that it would be better to have multiple exchange sites at your list to check how much a coin costs, at least an estimate if it's not that accurate, anyway, right now, most exchange sites have a database that most likely would be similar to other sites, thus, making the difference in price of coins not that far from each other.

If you are engage on multiple altcoin or bitcoin trading then its much better to have multiple exchanges too which you can able to arbritage too when you do see opportunities on making out some profits and not only that you can eventually less the risk on getting broke if one of those exchange is being hacked unlike if you do store up on a single exchange then you would really end up on nothing left.

that will be a very bad practice to do.Exchanges are being monitored daily for flaws by unscrupulous people and then they capitalize on such flaws if they find them to steal user funds.So it is never advisable to keep your funds on any exchange at all.Also if there is the need to seize their servers as happened with btc-e,you wont have access to your funds either

For me, Better to split your crypto into other exchanges for incase of problem you have your backup. And also its depend on exchange when your coin or token is in the higher price then keep it on particular exchange or use the official wallet of your crypto so you dont have to be worry of lossing your money.

I'm very worried about that. That's my opinion is very risky because we all know that when we save the coin in an exchange then we will not have a private key. I suggest to save on official wallet of each coin, and if we have a lot of coin then we save it in offline wallet which is much safer than web-based wallet and also exchange. But if we still want to use an exchange to do trading then I suggest not to save too much money on an exchange.

It all depends how much money you have on exchange in crypto. If you have less than 1000 dollars in crypto and you use very strong password with 2FA then it is OK. Depends how often you are trading them. If you are just holding then you should withdraw tjem to your personal wallet.

You can store your money any exchange. But it is important that you have 2FA security for your account. So you will not be hacked by your hackers. Be careful, now hackers have many sophisticated scams, we can not foresee. You can use Authy software to secure 2FA for your account.

Realy not safe if you stored your tokens or any coins in any exchanger because you are not actualy holding your own private keys in exchanger and beside of that exchanger can change or updates there wallet anytime.

I don't recommend that you put all your alts in one exchange because sometimes an exchange can get hacked which means you coins might get stolen while if you put that in like a ledger that's very safe and only you can open it.

Not recommended to safe your crypto asset at single, double, triple exchange, that place is only for buy sell transactions. Your wallet is the safe place to keep your crypto asset and as long you obey the rules, your asset will be safe. Second place to safe your asset is bank, meaning do one way transaction ( buy - sell - exchange ) at one time and safe it into currency at your bank. Maybe you're not familiar with this strategy but I know this is the right one.

Many people say it is not advisable and i do so agree but with my experience l just keep my coins that i used in day trading in one exchange so i may save some gas fee and time from transferring it from exchange wallet to my private wallet but for my long term coims i keep it in my private wallet for safekeeping purposes.

If you plane to hold your crypto currency, for the best you hold them in their wallet, except you decide to trade your crypto currency. Why I suggest you to hold in wallet because we don't know when that exchange will close or get some trobles. If that happent, probably you will lost your coin without garanted. And I suggest you to never put all coin in one exchange, make it 3.

I am also of the opinion to not keep all the eggs in one basket. For instance, if there is a security compromise of any exchange, the coins are as good as gone. This is the fact of the cyber world that no system is hundred percent safe. The reason is that humans are the developers of technology and to err is human. There are always loops in the system. Besides, all the exchanges have different things to offer.

People need to be a lot more careful when storing their coins there is not a day in the forum in which we do not see a story of someone losing his coins because of a dumb mistake and sometimes were talking about really big amounts of money and that is when I get surprised because if they do not take care for their money then what do they care for? We need to keep complete control over our private keys, no one else's should have access to our coins and even more importantly you should use a very safe way to store those coins if you are not going to move them at all, like a hardware wallet or a paper wallet.

Personally, I don't feel safe storing something in an exchange, things might go wrong. And at any moment that exchange most might be hacked or bankrupt. I prefer storing most of my coin in an hardware wallet, this is safer than ever. I actually have coins in some exchange but I dont stote it there in a long period of time. As much as possible, I have already done what I have to be done in that exchange then just transfer again when needed.

I completely agree with you, since there are some exchangers whose administration is abusing their capabilities. One of their trade exchanges is HITBTC.

If you are trading then its ok to keep them on the exchange but if you want to hold for the long term then its better to keep in hardware wallet to get safe.

It is not safe at all, Some exchanges are very high security. But Please keep client-side wallet like a MyEtherWallet for ERC20 tokens and Please use their own wallets if available

It is always best to diversify. This advice does not only apply to investments, whether cryptocurrency-related or not, but also to all kinds of investment opportunities, and also to exchange platforms. Do not just focus on a single exchange platform. Well, in the first place, you will follow the exchange platforms of your favorite and potential coins so you cannot just settle with a single platform. But also if the single exchange platform that you use is in maintenance or crashing down, then you will also be stuck along with them. So you better use around 3 of the best exchanges.

May be it is possible but current situation tells that it is not possible. Other thing is that in my opinion it is not good because if the entire cruptocurrencies store in a single exchange and something happened to the exchange then millions of people will lose their hard earn money or they may face withdrawal problems for some time. So it is not good.

I would never keep my coins on the exchange, the exchange at any time can hack intruders and I will remain without coins best to keep the coins on the hardware wallet to which only you have access

First thing bitfinex has been hacked multiple times and every time its users have lost their funds. Secondly never keep your coins on an exchange, period, thats like the first rule of crypto currencies. And even if you are going to keep them on exchanges than never keep them all on a single exchange.

I would use multiple exchanges of course and preferably keep my coins in a wallet which private keys I own.

I do not feel safe, when I send all my assets and money in one place. I frequently convert transaction volume at exchange sites (bitfinex or bittrex / binance) and blockchain. I personally have done this process often and feel safer. It seems to be a trader in a market that is risky and sensitive to security. I learned the cautious and good habits.

Putting all eggs in one basket is not safe. if it is Bitfinex or Bittrex or Binance all are exchanging sites if they shut down overnight to whom we have to ask. So try to hold coins in multiple sites. I think all cryptocurrencies are not listed in all exchanging sites so practically also it is not possible.

I agree it isn't save to hold all cryptos in one exchange. But when I use hardware or desktop wallets I cann't use limit for orders.
So I try to use several big exchanges to hold cryptos I want to sell and all others on hardware wallets.

You should instead find hard wallets and other type of wallets where to store your coins instead on an exchange....remember you don't own anything if you don't hold your private keys,...remember what happened to bitgrail and all nano holders lost everything on the exchange

If you are referring to storage, you shouldn’t store any cryptocurrencies on an exchange because they are at risk of a hack or the exchange losing your money. Only store them on a paper wallet or hardware wallet, or at least the coin’s wallet and secure your private keys.

If you are referring to trading, you have to have some on an exchange to trade. I don’t think it matters that much if you use one exchange or several to trade. I use 2 exchanges only because they have different coins that I can’t get on the other one.

It's impossible for all are to be listed on one exchange, they have different requirements that may not be complied by the new Alts, some exchange were to strict in listing that makes them much secured to do trading.

Yeah agree, using some exchange will not be too confusing to you, at least it will make the risk of losing more smaller. yeah for example if the maintenance happen you will not be confused to wait because you have another coin in another exchange, or when the site down you still have another asset in another exchange. I think it would not hurt to split your coins in some exchanges

The right answer has been posted in the beginning of the thread, I would like to add my own opinion. You should put your coins in your own wallet in which only you has the access of it, you own your master seed and it's your own responsible to keep it safe.

Definitely, its good to have another backup of exchange in order to choose some potential one. Every coin has also a difficulties and struggle in the market so I think it must take some another coin and have great exchange .

Much better to have multiple exchange to use as we never  knew when opportunities will show up, you can deal with arbitrage trading if you have multiple exchange and just in case hacked happen you still have some save coins from another exchange, as we can't predict how things works in this business, a lots of possible things that's needed to check and needed to take into considerations, we should take this advise not to place all your eggs in one basket to have back up in anyhow.

Think about mtgox. So always keep your crptocurrency separate.
But it does not mean that you have to put it all in your own wallet. After all, you can miss a lot of the market opportunities in your wallet and your third-party wallet at risk of being stolen.
I personally feel that the first, investment in crptocurrency  must be within the scope of the funds that you can afford, and then some of them are used as reserves in private wallets, and the other part is used as trading products and placed in the market.

It is dangerous to store all the coins on one exchange. Use at least 3 exchanges, but the top ones, because there is less likelihood that something will happen to them. Keep on the stock exchange only the number of coins you need to trade.

If you really have to use an exchange, use more than one.
At least, if something happens, you won't lose everything.
But a personal wallet on which you own the private key is of course safer.

I think it is impossible to get all cryptocurrency in one exchange. Many cryptocurrency will be listed in multiple exchange and some would not be listed at certain exchange at the same time. It is not adviceable to keep all your coin at exchange either.

it's better you only have assets in one exchange place because if you play in exchange place more than 1 place you will confusion of asset that you have there which will surely forget and confused.

Keep your coins at a very secure place that only you can access it. like ledger. because in ledger your coins is safe but of course you need to pay for that ledger but it's alright because you can loose alot if you don't store your coins properly.

If you are opting for an exchange to keep your coins then its advisable to store them on multiple exchanges rather than keeping all coins at a single exchange. If you are looking to store them for a long-term then use a wallet, remember exchanges are a favorite place for hackers to steal your coins.

Exchange site is use to trade crypto (bitcoin and altcoins) not for storing it. If you have that many crypto then make more account in different exchange and trade it if you want to. If you want to keep your valuable coins and want to HODL it then I suggest you to buy hardware wallet such as trezor or ledger.

exchanges are not wallet!
just keep the money you want to trade with in any kind of exchange , finally none of them give you the private key , and if anything happens to any of them you can reach through you money in any other way!

For me its not wise if you use only one exchange. Its more wiser if we use different exchange. And the rate of every exchange are different or lower than the other.

If you need to keep your coins on an exchange I would suggest not keeping them all in one in case something happens to that exchange which does happen from time to time, the ideal thing to do is to purchase a ledger or trezor and keep your coins in there, alternatively if that is not an option try to spread them around to limit your potential loss.

In my experience, I advise you to keep the currency on different exchanges. At least 2 or 3. Anything can happen and you can lose all your money.

If you really want to keep your coins not for trading or for a HODL purpose i suggest you not to hold in any exchange at all because they could turn into scammers if there is bad thing happens to them.
Like Bitgrail , scamming people who hold their coins in it, so the best solution for you is holding it by yourself with the local wallet.

I dont think youre worry free storing all your assets in a particular exchange, unless you know the biggest risk that it bears. Exchange is simply designed to do trading, and yes you can store any coins that is listed in that particular exchange, BUT it is very vulnerable to hackers and worst what if the exchange itself it being hacked and shutdown?. Its still different when you store it in any kind of wallet, for it is designed to last forever.

Well, that's not a good advice. I mean storing of ones all cryptocurrency on an exchange site because there is no wallet that is ever safe not to talk of an exchange site which can get hack any time and almost 95% of all exchange site have been hacked before. Therefore, storing of cryptocurrency in different place is the better option.

Of course No, Not all of cryptocurrency at in the single exchange because in this kind of business you can multiple to them as long as you are not exceeded to their limitations,
so that’s the reason why is no for me.

I think not all of the cryptocurrency at the single stage of exchange because last time that I check theres a lot of competitors that they have in this kind of business that try to compete to the quality of their business to the original one to be compared.

If you do not want to trade, keeping a coin on your wallet is best because giving money to someone else is certainly not secure, even though they have high security. Always be careful and have a proper investment in this market because anything can happen and preparation is essential.

It depends if when your coin will be listed because some exchanges not listed a coin if they know that the coin is not worth it to be listed in their platform. And i think much better to use a multiple exchange than to focus in one.

It is a big risk if you will keep all of your cryprocurrencies on a single exchange as if that exchange got hacked and no one repay you then you will lose all of your portfolio. It is better to keep your coins on different places if they are your long term investment then do not keep them on exchanges but keep them on your wallets. If you want to stay on exchanges then try to use different exchanges but stay alert that do not use low security exchanges.

No it is not safe but it is more dangerous than any other anger to your wealth.
If someone will keep all of his coins on one exchange then he will be hostile to his coins. We saw in the past that many excahnges hacked and the hackers got success to escape with our money. Even big exchanges from high securities are hacked in the past. If someone will know about that then he will never keep his coins in one exchange.

   No, it is not safe to stay your coins in single exchange because anytime exchange may shutdown. It is not advisable to keep your coins there much better to keep your coins in a safe wallet which you hold the password and private key alone specially if you want to hold or invest your coins for a long term.

It's not but if the case is we are talking about leaving it all in Binance then I would feel all my coins are there are very safe. And putting it in other exchanges does not make it safe, transferring it your harware wallet is much safer.

It is impossible or unbelievable to believe that all cryptocurrency is at a single exchange state or level in this industry
because we are all familiar that in business world there’s no assurance that you will have none competitors  in this kind of business.

It depends on your purpose, if you are very active daily trader then it is OK to put all your portfolio in one exchange but if your main purpose is for long term holding then it would be better to store your coins in your own wallet. Just put your coins in exchange whenever you are going to trade it actively,  withdraw it back to your wallet when you are done with the trade especially if you are going to stop trading for a while.

I dont think it;s a good idea. It's gonna be dangerous if you will place your cryptos there. Much better if you have your wallet to keep it say. You will not know when those will eventually shut down and may possible bring your coins down as well. Be careful where you place your coins because they are prone to scam.

I know that there is a currently an ICO exchange that aggregates all tokens. What I mean is that, they want to collect all of cryptocurrency and listed it under their exchange. The problem here is that, if a certain exchange has all cryptocurrencies, there will become a big problem with their liquidity and it will result for a certain transaction to become slow.

Keep all coins in single exchange is big risk and for the better dont do it, this is will be much risk because already many case about exchange that get hacked. I personaly used 6 different exchange and by that way i feel more confindence and safe to left it there and without worry.

I don't recommend that you put all your alts in one exchange because sometimes an exchange can get hacked which means you coins might get stolen while if you put that in like a ledger that's very safe and only you can open it.

Even if you keep in multiple exchanges, it's never safe to keep them on exchanges because you don't own the private key on exchanges. But, most people keep doing so, maybe because of the transaction fees the exchanges charge and the level of confidence they put on these exchanges.

I would spread it out onto multiple exchanges. Coinrail was hacked recently and that is a reputable exchange, so the only way to secure your funds is to hold some in your own personal wallet, and spread the rest out on different exchanges for trading with

I do not recommend to save a lot of money on an exchange only, otherwise I do not recommend you to trust only on an exchange only. This is very risky because as we know that many exchanges are experiencing problems, there are some who experience hacking and it makes all funds owned by the user is lost. That's why I say that exchanges are a risky way of storing large amounts of money. So for me the wallet that has a private key is a good choice, in addition to safe we will also get a sense of comfort because we will not worry in storing funds in large quantities and in the long term.

if you are holding them for a long run than definitely don`t leave them in exhcanges rather use a wallet or hardware wallet as you can see there are many hacks going on centralized exchanges,

Pretty safe to hold yours cryptocurrency at a big exchange. Yours fund will safe at that exchange and you only need to protect yours password, gmail to avoid hackers get yours cryptocyrrency out.

Basically, we aim to have a good exchange site since thise exchange site may save their transaction fee. Well, ai would say it depends on your own perception but for me much better in different exchange sites to be more secured as well as it depends a kind of coins that you have. Also, if you find out that exchange site have a great security will I prefer on that exchange site but somehow you must be observant or attentive the kind of exchange you wish to trade or sell your coins.

It's not good to save in exchange, because the exchange is very vulnerable to hackers.
Unless you trade every time on Exchange, for example at Bittrex, Bitfinex, Kraken, Binance, Kucoin etc.

If you trade every day you can see the info continues and when there is a problem (hacker) on the Exchange you will not be overwhelmed.

It is possible if the exchange can handle a lot of traffic from the user like trader and investor and also visitors of the site because if the site cannot handle that then there will be no possibilities for an exchange to just handle all of the cryptocurrency because if that happen then it will be just a difficult thing to maintain since it needs a lot of capital to build a site that can handle a lot of traffic.

It is very risky! Specially when you don't own the private keys of every wallet in the exchange, it is not very advisable to store your coins in some exchanges, specially in the centralized exchanges. Much better just store it to your personal wallet.

A single or a multiple one still not make a difference at all. I hope you are active in the crypto scene because hacking is very usual to happen in exchanges. So if you just place them in exchanges, you put them where there is a huge percentage they could be stolen. Creating an offline wallet or buying a hardware wallet is the answer.

Don't ever store all cryptos within exchange, you're risking to lose everything you have. Buy a hardware wallet and transfer your assets there. On the exchanges, you can store small amounts of coins, which you're not afraid to lose. That's what I'm doing. I hold some crypto on cex  https://cex.io/  only for trading, and the rest is in my wallet.

It is not a right choice to keep your tokens in an exchange, unless you have the intention to trade it.
It is best to keep tokens/coins in a wallet (cold storage is better)

Yes the funds should be in a wallet if it needs to be secured because most of the exchanges were hacked recently.OP needs to understand that exchanges is only for converting our crypto then it should be moved to a wallet where we can control our crypto currencies.Keep your coins in exchange only if you have the intention to trade it nearby.

It is very dangerous to have all the cryptocurrency in an Exchange because the Exchange is always the target of hackers and scammers so you can get stolen assets at any time and in fact there are so many Exchange hackers. Keep coins in many places if you want to trade, and if you do not trade regularly, keep your coins on your hardware wallet.

It all depends on the reputation or status of the exchange account itself. And I myself prefer to use NEXYBIT (https://nexybit.com/) exchange account because the people inside are very professional and expert even in the implementation of his campaign their DEV nexy_jin (https://bitcointalk.org/index.php?action=profile;u=2104611/) always pays us on time, not only that yesterday I made a withdrawal (say the amount is very little), Alhamdulillah the transaction can run very smoothly with no obstacles at all.

It is not recommended to store all cryptocurrencies in one exchange or even in one personal wallet. Don't use exchange as a wallet, exchanges are not safe ad wallet. Two months ago, Bithumb exchange was a hack, that Exchange had pretty high security but still they got hacked. Ways try to use a hardware wallet to store your coins. If you can't use hardware wallet then you should use multiple online wallets. Don't keep your all money in one wallet.

Storing your stash of cryptos on an exchange is not even recommended in the first place. Only do so If you're an active trader and only keep a percentage of your holdings on the exchange. While dealing with Cryptocurrencies is interesting, one major downside is the security. In just one clean swoop, you can lose everything (Your profits, capital) etc. You've to take it seriously so. Just get a personal wallet instead.

Actualy in that case's thats making a transaction only in one single exchanges,theres a positive and negative impact to the investor,the good impact is  maybe in thats situation we easily to get all crypto coins because they are only in one exchanges ,but how about if the processing fee they will rise,we are no choice to find another kind of trading exchanges, we become freeze into there exchanges rules ,although the negative impact thats theres no competition in crypto exchanges market because all will depend in one single exchange only.

Never ever keep your eggs on a single basket and this thing been said for how many times but people do still stick on storing or using exchange wallets as main ones rather than on using other wallets either pc,web,or hardware ones and as you said no exchange would really be resistant to any hacking incident and no matter how good the security is there would be still a flaw or exploit.
If you put up on a single exchange wallet and been hacked then you would be fucked up.

I know how it feels when you see an opportunity and you don't have enough funds in your wallet at the exchange site to invest that's why you would rather keep your coins in an exchange site to avoid paying fees. But as other already suggested, its not safe to keep your coins in an exchange site and its not even more safe if you keep it in just 1 exchange site.

No. Even if you put your crypto in several exchanges it is not safe too.

The most secure location so store your crypto is at your own wallet, Period.

Personal wallets are good, but they don't seem to be suitable for daily traders, so you should have several different markets,
and choose a market that has high confidence, so the security level is also good.

I think the ideal would be to have exchanges that offer all the wide range of altcoins that exist today, but unfortunately it is still impossible to have such a benefit and it is necessary to open lots of accounts in countless exchanges to have the possibility of trading with different altcoins.

I do not know if in the near future there may be a solution to this problem, since decentralized exchanges like etherdelta, although it offers the widest range of altcoins to exchange, has proven to be extremely vulnerable and inefficient, so we are still waiting for a real solution that not even the atomic swaps will be able to solve completely.

It is not safe to store your crypto coins in any exchange for a long time. Exchange wallets shouldn't think as the main wallet. If you feel insecure with Metamask or other wallets then buy a hardware wallet, hardware wallets are cost high! Crypto exchange can hack anytime, bithumb hacked for twice in this year but that is a big exchange no doubt. Now, you should think about it.

Iam will not do that because seem too risky,  we know already some exchange get hacked. At the moment i used 6 different exchange and this is way to minimize risk from hack.  By this way we can trade more different coin. Others thing that very important when use more than 1 exchange is use different email address and different password on the each exchange.  

Even for active traders using 1 trade exchange will be quite risky, I myself use 3 exchanges for variety and security, it will be much
safer and more profitable than just using 1 exchange. other than that if you want to save long term, then choose a wallet.

indeed to keep assets in the exchange market is not recommended for a long time because it is very risky hacked and I think if only to trade in the short term I think there is no problem

There are exchangers that does not have a good security and reputation so it was better to use different coins to avoid losing all your investments if the problem occur on the exchanger you are placing your coins.

I think we should diversify our portfolio to minimize risk. Because we are not sure about the direction of the market in the future. That is the way I usually do to avoid a lot of losses and if lucky, I will be more profitable. Invest in more than 5 altcoins, do not invest less than that.

So in essence, to be used as an active trade and or to save for the long term or to be used as a wallet, the exchange is not suitable to be used as a wallet and you must use more than one exchange for active trading. I once made exchanges as a wallet, and in the end I lost all the coins I kept there, if you want to find a wallet for crypto, look for a wallet that you can fully control or control as you can store and have a private key, and do not make an exchange becomes a wallet, because it is not recommended.

As long as the exchange account used has a good reputation or isn't defective in the public eye I don't think it's wrong. By using one wallet precisely it will make your transaction'be easier and more practical, for example you use Nexybit Hybrid Exchange. With the NEXYBIT  (https://bitcointalk.org/index.php?topic=4557949.msg41060446#msg41060446) wallet there you can save your coins (such as BTC, ETH, AE, ATM, EXC, GTO, OMG, TTC, TUSD, USDT, ZIL and ZRX).

That's a big NO NO because we should keep in mind how vulnerable cryptomarkets will be from hackers. In practice, i always keep all my cryptocurrencies in MEW for all of my ERC-20 standard tokens and other wallet to non-ERC-20 tokens. I only transfer my crypto to a market once i want to trade my crypto.

While it's convenient to trade on a single exchange, it's not advisable to store cryptocurrencies on exchanges. Wallets are meant for this. And the rate at which exchanges are being hacked in recent times, one must be extra cautious.

I dont think that is suggested unless you are a day trader and at least buy n sell the coins once in a week. Its best to keep your long term tokens in wallets.

I think it is not possible because one coin might destroy a reputation of one exchange. For example, one coin has a very bad reputation. For the exchange's reputation not to go down, it's better for not to let the coin stay in your platform.

in one exchange is certainly not a good global exchange, this is just as we are encouraged to save money in one bank and will certainly risk the future of the crypto currency because of the lack of transparency and the authority that can be said to be liberal

I use more than ten exchanges and several separate wallets ;). Now there are several thousand different tokens and cryptocurrencies and it is absolutely unrealistic to have them all on one exchange. The software of any exchange will not be able to support trading operations with such a number of cryptocurrencies.

Some exchanges like Binance, Bitfinex and Bittrex are the strongest exchanges currently available. I do not think there will be any problem holding your coins on these exchanges with a api disabled 2FA enabled account.

Although 2FA is used, i don't support keeping the crypto in exchange. First of all, there is a possibility of hacking, although it is the safest exchange. Secondly, the money in exchange is't exactly yours, you don't have the right to request for private key. Also, they can freeze your account at any time. Using offline wallet protects you in any situation.  ;)