Bitcoin Forum

Just from the title alone… I wanted to ask what possibly the best wallet to hold bitcoin in?

Before anyone says that it depends on what I need specifically then here is what I am here for. I can not decide which one really is the best based on the things I want. First of all I plan on holding some bitcoin (not huge amount) for a foreseeable future. However I also plan on swapping it for usdt from time to time aka when the price is getting high. I need a wallet that has low fees when swapping , preferably decentralized and in mobile and is secure.

Any recommendations?

Bitcoin Core? Space is not even a problem if you enable pruning. I see no reason to use something different.

You can use Unstoppable wallet. It has has the swapping feature and it supports bitcoin. It is still one of the best bitcoin wallet. But if you want to hold your coins, cold wallets are better, especially if it is huge amount.

He is not referring to Bitcoin Core. He is looking for a good wallet that he can swap bitcoin for USDT and swap USDT back to bitcoin.

Sounds like a very unsafe plan. Let's just hold his BTC in Bitcoin Core and, when time will come, move them everywhere he wants to sell them.

You need to stop posting what is wrong and what can mislead people. He is not saying he has Bitcoin Core, why recommending a wallet that will take over 500 gigabyte to download the full blockchain? Even if it is a Prune node, how about the daily data requirements to keep updating it to the latest blocks? This is not what the user want. At least recommend an SPV wallet instead. Bitcoin Core is also still an online wallet and not cold wallet.

Wasabi Wallet has the best privacy, it's available for desktop.

Dude calm down and read again what i wrote instead of make false statements

Most wallets have their sizing for each transaction and you can set it from low priority to highest priority per transaction that you make so it won't be a problem. It's still best to own a hardware wallet if you have plans of holding your BTC for a long time. IMHO, it doesn't matter whether you hold big or small, if you are for security then buy a hardware wallet like a Trezor wallet because it will serve as your investment too to protect your asset.

But if you can't avail that yet, the option for you is to use Electrum but this for Bitcoin only. There other desktop wallets too but most of the members here will suggest you Electrum. And about the swapping, you can use instant exchanges to transfer it there.

If you use windows, you have other options too ~> https://bitcoin.org/en/choose-your-wallet?step=5&platform=windows
And for the hardware wallet, aside from Trezor there are other options as well ~> https://bitcoin.org/en/choose-your-wallet?step=5&platform=hardware

Why not bitcoin core for real?

I don't recommend Bitcoin Core's wallet to people because of the lack of BIP39 support. Most other wallets allow you to connect to your Bitcoin Core node anyways.

        -   So far the wallet I use is Trustwallet and unstoppable wallet, as of the moment I don't experience anything bad using the two wallets I mentioned op. But of course it's better to do some research on google so you can confirm if what is recommended to you here is legit. 

It is better for us to be careful with the apps wallets we use if we are in the field of crypto space like this. Because everything we do here always has an attached risk.

Firstly Op don't store you coins on an exchange because although they are not decentralized they also have full control over your coins. Now since you are going to be hodling the coins, I guess  you won't be visiting them often therefore for a safer option I recommend you store the coins on an offline wallet ( a cold storage) or an air gapped device. If you are going to be making use of an air gapped wallet you should make use of an open source wallet and the best I'll recommend for you is ELECTRUM.

Make sure you have a physical back up of your wallet seed phrase and if possible your master private key also. This will help you recover your wallet even if the air gapped device eventually crashes. Wish you positive results in your Bitcoin hodling journey.
Don't forget to keep your keys safe 😁

I think the trust wallet would be discouraged as it is a closed source wallet and does not meet the OP's decentralization requirement and it really does not warrant us using it. Another thing is that I have never used the swap feature on the wallet, but I think their fees will not be low, while what the OP asked for is low transaction fees, being able to swap directly on the wallet. I don't think there will be a wallet that can meet all the OP's requirements, I don't think there will be too many options for him.

The last time I use Wasabi, it is bitcoin wallet and coinjoining wallet but not having swapping feature. You are now a reputed wallet if the Wabisabi coinjoin has been removed. I can also recommend the wallet if password which is passphrase has been changed to passphrase. But the OP will need an exchange to be exchanging the coins. I recommend Electrum which is the wallet that I use the most. I also recommend Sparrow and Bluewallet. They are also all bitcoin-only wallet.

Have you changed the password on Wasabi wallet to passphrase or word extension? I remember the last time I used it, it was password. But you clearly know that BIP39 passphrase is completely different from password. If you have not changed that, I will still not be recommending the wallet.

You have this completely backwards. Wasabi never removed the coinjoin feature, Sparrow was the wallet that removed the coinjoin feature. Bluewallet never supported coinjoins at all.


Yes, it's changed.

With all your explanations on what you needed, i will advise that you go for electrum wallet, i would have given you bitcoincore but am considering the demands expected from you to use that since you're not considering large amount of money involved, just make use of electrum wallet and have it installed on air gapped device, safely secure your private key, you can always make transactions from there to any wallet at an adjustable rate, and its such a wallet that supports for the feature of RBF, you can have both a mobile version or desktop version as you may want it.

From the title alone and without going into what you need, the best way to store your BTC is in cold storage, that is either in a hardware or airgapped wallet. You should also ensure that you use a self custodial and open source wallet.
Now to what you want, you may need to store your coins in a centralized exchange since you want to swap your BTC to usdt regularly. Take note that if you are talking about fees, then you don't have to worry about the wallet you are using, as all they do is to estimate fees for you, and you have to check the mempool before making your tx. Store some of your funds in Electrum, and if you want to swap regularly, you have to keep some in a centralized exchange and bear the risks.

Electrum is certainly a wallet that I will also recommend for any bitcoin storage but looking at the OP’s preference I think using electrum will be a thing of trouble for him because he still needs to store his usdt. What I think OP is trying to do is probably sell at high price keep the usdt and then buy back at low prices again. Overall it is bad strategy to me. But if that’s what OP wants then he Should go for unstoppable wallet he can save up the two coins there and they still have the swap service there.


There is no need for a back of master private key, the seed phrase can be use to recover the wallet and even in the future if electrum fails to exit one can still use tools to recover back the master private key again. Backing it up now will just be a redundancy. More of the reason why seed phrase is the perfect choice for back up

It is better that you store some of your bitcoin in a hard wallet and that should be the bitcoin you will never swap. For the ones that you will swap, you shoukd store them in a seperate wallet which have the swap features. Unstoppable is a good wallet with such features, or you should store the coins that you will be swapping in an exchange so that whenever you want to swap it, it will be very easy especially if you intend spending the swapped bitcoin to USDT.

You should also know that it is not safe you store your coins in an exchange, so you should make your choice on the options above. We all will be responsible for our own actions.

Bitcoin core is a bad choice for many beginners, I said this because OP stated that he is not even holding a lot of Bitcoin, but he planned to hold for the future, I doing someone like him can afford to run Bitcoin core and download that massive data.

It costs me $30 to get 300MB in my country every damn month and Bitcoin core requests over 500MB right now, that will cost a lot, since this is even Bitcoin we are talking about there are many good Bitcoin wallets out there now compare to alt crypto wallets.

I recommend Unstoppable wallet, everything OP asked for is present in this open source non-custodial Bitcoin wallet, Electrum is also a good choice but I can't recommend the Mobile version, it is too buggy, Unless OP has a laptop PC, but Unstoppable is available on mobile phones, the best ever for anyone looking for a Bitcoin wallet for mobile phones.

If you say which is the highest best wallet then it will be the hardware wallet which will give you high security of your bitcoins. and if you want to use software wallet then you can use Electrum Wallet it is decentralized and till now it has maintained a lot of reputation. Bitcoin users trust it a lot because of its high security. here you can also deposit high amount of bitcoins without any hesitation. If you put in any other wallet there it can be more risky. In my opinion this is why I trust Electrum Wallet so much to keep Bitcoin safe

If you want to accumulate bitcoins it is definitely best to hold bitcoins for a long time. For this you can use hardware wallet as a hard wallet, where your bitcoins will be most secure. But I don't think there is any need to exchange your USD, if you hold Bitcoin you should keep it in Bitcoin and you will get the best results. Very common are two types of software and hardware wallets, you can choose any type of wallet.

Here are pictures of some hardware wallets you can choose from, but their functionality is very good.

https://www.talkimg.com/images/2024/05/23/L28nG.jpeg (https://x.com/TheBTCTherapist/status/1742729744452379080?t=5Ea1HJwUPZdwMBMkZW6x8g&s=19)

You can use Bitpay wallet, it has all you want to do including ability to swap between bitcoin and vice versa. The fee is great and suitable for what you want to achieve except when the memepool is congested which then becomes a general problem. Besides, it is self-custodian meaning you are in full custody of the seed phrase as it is not stored by Bitpay. I would have recommended hardware wallets but from your post, it is obvious you are not holding for long, just buy low sell high kind of stuff. So Bitpay wallet is ideal for all that and from the review so far, I have not seen any bad reputation attached to it.

Electrum is recommended because it is open source and users can verify their code for bugs and to make sure it is safe for use, and even if you don't have the knowledge to verify its code, it is a wallet that is widely used in the community, and so it is also very well reviewed by many BTC users.

However, Electrum is an online wallet, and isn't recommended for a large amount of BTC, except you run it in an airgapped device that is completely disconnected from the internet.

You can use Coinomi or Mycelium I think you can swap USDT right on the app if I am not mistaken. For fees I think they are also customizable. Just don't use untrusted wallets or else your funds will be gone. I've been using those apps I've mention since 2017 and it's working well though I have never tried swapping USDT but with other coins yeah it's good.

$30 to get 300MB?? How possible is that? I guess you made a mistake or wanted to write gb instead. And Bitcoin core requires over 500GB not MB. What op need is just a simple wallet like @ Charles tim had suggested earlier. Unstoppable would be fine for you op, since you clearly stated that you won't be storing large amount. Avoid wallets like trust even though they have the swap features, they are still unsafe and not reliable. I think I've also come across the swap feature in Mycelium also. All you have to do is select a new token under the etherum network then add usdt to your wallet. Then you can swap to usdt from Bitcoin on Mycelium from time to time. Mycelium is still safe and I've been using it for years now without any complications, just little issues with balance update.

He doesn't need Bitcoin core for that purpose, any SPV wallet is good enough to store for long term and move the funds to exchange whenever we want to sell. So if OP is a beginner then I won't recommend core at all, Electrum will be my recommendation, it just takes few MBs of space and in future, he can connect to your own node as well if you don't want to rely on third-party servers.

Ledger is the number one among the hardware wallets on that image, but Ledger is not a good choice. I can recommend Passport or SeedSigner. My second recommendation would be Trezor. The one that I against most is Ledger while in one way or the other, I can still recommend others one that are listed.

I guess you got plenty of suggestions already on which wallet is best for different purposes. I personally use Electrum for myself to hold the coins. I don’t use it to swap to USDT, but yes it’s the best for holding Bitcoins. Just make sure your PC doesn’t get infected with any virus and you are good to go. Moreover if you really love your hard earned bitcoins then it’s better to avoid storing them in any online wallets or exchanges. Now I assume you are very smart enough to choose the ideal wallet for yourself from these plenty of suggestions.

You've likely received numerous suggestions about which wallet is best for various purposes.

I use Ledger and Bitlox to hold my Bitcoins; that is the safest option.

Given the many recommendations, I'm confident you can choose the ideal wallet.

Also, you can find some suggestions or a list of all the best hardware wallets (https://cryptolinks.com/hardware-wallet) and all bitcoin wallets (https://cryptolinks.com/altcoin-wallet).

Be careful with desktop wallets and malware. I know a few people who have lost their coins due to such things.

You can go to this site there complete from hardware to software wallets. https://thebitcoinhole.com/
Owner's official link: 56 Hardware Wallets, compared feature by feature (https://bitcointalk.org/index.php?topic=5416497.0)

For fees it depends on the network itself while Wallets do not specify fees so they usually only provide DEX features.

Op, to me I will advice you go and search or browse what you are looking for because I don't really understand what is going on here, nobody wants to agree what the other person is saying, there's a lot of  argument so I will advice you look for it yourself and then if anyone matches what they have mentioned here then know it's the right one because you can just possibly pick one and despise the other one that may lead you to mistake. But I see no reason why they should be arguing on this thread, in as much as I don't know the one that is good to use I wouldn't want to choose side but I will suggest they stop the argument so that someone who ask won't get confused or discourage the more.

I forgot to mention that it should be in mobile if there is any.

I tried Exodus and OWNR wallet, they are both good. But currently I'm using OWNR, there are a lot of other functions, like selling your crypto instead of exchanging it for USDT or buying gift cards.

If it's for Bitcoin and it's not such a large amount, I think Electrum is fine to use, but if it's a large amount of bitcoin, of course I suggest you use a hardware wallet. 

If you are referring to top crypto assets to accumulate and hold long-term, Trustwallet, Klevr, and Coinomi can be there; these are just a few that, for me, are good and have given
me a good experience.

Electrum wallet is probably the best of the bunch, no doubts that it's going to be the first one in the list. Some of the few features that makes it stand out is that it's open-source so you know that you're not going to be a victim of wallets that are locking out the finds of their users and another feature that although not unique for a crypto wallet, they do it best, it's the sleek but simple to understand design for their wallet, you don't have to navigate to different places to be searching for thousands of things, it's a wallet that stores your bitcoin and you can use it to send your bitcoin to other addresses, that's it.

There are several good bitcoin wallets where you can keep your bitcoins safely. You can store your bitcoins in hardware wallet or electrum wallet, I find these wallets safe. Electrum Wallet is a popular wallet that also offers an extra layer of security. It allows users to securely store their private keys and transact without the risk of being hacked online. Using this type of wallet for Bitcoin is very secure and can be trusted by any user. However, just as it is important to choose a secure wallet for storing bitcoins, it is your personal responsibility to protect your lock keys.

What I see is that people are giving recommendations on Electrum as well as many other wallets and Electrum is a perfect choice for storing bitcoin but that's not what OP is looking for . He was looking for a wallet that could directly exchange between bitcoin and USDT , and Electrum did not offer that feature .

I have never seen or used any wallet that features a direct exchange on the wallet, and is open source and non-custodial wallet . Is Bitpay an open source and non-custodial wallet? By the way, I saw the OP said that he is looking for a wallet for mobile version and does bitpay have a version for both iOS and Android operating systems currently?

We have a lot of options and everyone's choice is different but I prefer Bitget wallet, and trust wallet, however, Bitget wallet is one step ahead and enhances deposits in their own  Dapp via the P2P method seems interesting to me.

Best wallet would always be offline wallets, ledger would always be my top choice for securing and holding my crypto.
Sometimes I would also use a paper wallet if it is just a small amount and I know that I wouldn't hold it for a long time.
And for swapping BTC to USDT or other crypto, you could use Nano Ledger Live if you would choose ledger for your crypto.

Trust Wallet is a wallet that often has many problems that we have seen lately although I myself have never experienced it but so far avoided the wallet but if you store a small amount then it will not matter.

Now there are many best wallets that are open source and certainly not owned by certain institutions such as exchanges, so for the time being choose BlueWallet and long term is hardware.

Yes it is true that there are many fake Dapps now but if they make sure the URL is valid and always check then they will not get caught in phishing.

I think you should try learning the Electrum Wallet. it is also available for desktop and mobile.
Maybe you can find more information related to Electrum here. https://bitcointalk.org/index.php?board=98.0

Whatever wallet you use, they already have security standards. It's just that sometimes we as users make mistakes.
My advice is when you plan to store Bitcoin in larger amounts and long-term in the future. buy a hardware wallet.

Hmm, Bro first of all you need to be particular with the Bitcoin wallet as if you have a massive amount of Bitcoins accumulated you need the hardware wallet for the best security, and if you want to frequently access your coins and want to actively trade, on the same time if your funds are not too much-decentralized hoot wallets are also a good option here if you are a newbie I will recommend to use the user-friendly UI wallets such as Trust wallet if you are concerned about some more features Electrum ist he best solution you can even use it with your Hardware wallet.

Since you can easily swap or send them exchange for USDT, then Electrum wallet will be perfect for you or BlueWallet.

These wallets are decentralized and open source, you will be responsible for any activity going on in the wallet because you will be the one holding and maintaining your private key which if you know more about wallet you will know by know that it is like your pin to your account which is your wallet.

I will recommend you to read about wallets, keys and address in this book (http://learnmeabitcoin.com) so that you will understand how the wallet works and you will know the importance of your wallet private key.

How can a wallet be decentralized?  especially light wallets like Electrum and BlueWallet? These wallets use centralized servers to connect to Bitcoin nodes.

Maybe you meant non-custodial wallets?

If you want a best decentralised bitcoin software wallet then it should be electrum wallet. and there are some other multi-chain support wallets like Trust Wallet, ImToken etc.  But electrum will give you the most security of your bitcoins. But if your bitcoin amount is very large like 1 bitcoin or more then you should buy a hardware wallet. I think that would be almost everyone's opinion

Electrum is an open source wallet that is quite good to use, there is a lot of development going on and security is constantly being updated. I use it for my desktop and mobile. related to definite security issues, of course it depends on how we as users, whether we use it wisely or not. because security will be vulnerable when users don't think about their own security and tend not to care about the security of their wallets. Hardware wallets can be a very appropriate recommendation for vulnerable security problems and will be the main storage for your assets.

Best wallet for each person is individual demand and my favorite wallet might not be a best wallet for you because of your demand to use, store, exchange and avaialable OS.

Recommended wallets (https://www.lopp.net/bitcoin-information/recommended-wallets.html)
Choose your wallets (https://bitcoin.org/en/choose-your-wallet)

A not huge amount in value now can be valuable in future because Bitcoin will continue to grow in value and price. So when you store your bitcoins, always consider methods, wallets to store it safely.

To keep your bitcoin safely, store it in non custodial and open source wallet for Bitcoin only.

Don't store it in wallets that can use together with altcoins and can swap to wrapped Bitcoin tokens or altcoins. It's risky and if you want to exchange your bitcoins, you can do it anytime with another wallet.

Wallet for trading, swapping must be different than a wallet you use to store main capital.

I think Bitcoin Core might be the best choice. There are many scammers online to steal your money so be careful.

I think Electrum is a great wallet. It's noncustodial, pretty easy to use, light and reliable, and completely free. But it's just for Bitcoin, no trading for USDT there. Others suggested that you can just trade when you need to, but store your BTC securely in the meantime. If you absolutely need swapping, there is Blockchain wallet. I've never had any issues with it personally, and they claim to be noncustodial, but op is likely to find a lot of distrust of it on the forum. Also, I think they now require KYC for swapping, which is a major factor to consider.

Security is the first thing that needs to be prioritized when storing large amounts of Bitcoin. Electrum is also one of the Bitcoin wallets that can be obtained for free and is open source. Electrum is also very easy to use and can access wallets on several different devices and uses the smallest unit standard in Bitcoin (mBTC). Electrum is also very widely used by members on the forum, although some use other wallets to store Bitcoin because each member's choice depends relatively on which wallet they think is safer. Regarding security, it goes back to each user, only each individual can guarantee security depending on how much they care about the assets stored in the wallet.

How small amounts? Exchange how often to USDT?

I would say, anything under a couple thousand dollars, I'd rather store it on some cheap blockchain (Polygon, Solana, etc) in the form of WBTC. Yes, it's not purely BTC on Bitcoin. I know. But your on-chain deposit/withdraw transactions would accrue a lot of unnecessary fees and eat up your profits.

In particular, no matter how strong the wallet is, if the key is not kept safe, the assets will not be safe. So as soon as we collect the wallet, the key must be carefully kept in a good safe place, maybe it is best to write it down in a diary page and keep it in a safe place. Because wallets can never be password protected in Google Drive. But keep your passwords as safe as you think safe. That's why you can choose either hardware wallet or software wallet.

It's not appropriate to give you names of the wallets as you have not listed the details on how you want to use that wallet and what type of transaction you'll do time to time using the wallet.

It's not a small thing rather it's a very important factor while choosing a wallet. Google can give you a list of the wallets you can use while storing BTc but you have to choose wisely between your needs.

I use Electrum wallet on both mobile and PC and it works pretty well if you are not planning to hold a lot of funds in it. It is safe and secure as long as you keep your devices away from phishing attacks, malware, and other such stuff that could get access to your device and then get into the wallet software that you are using.

When you are using online wallets either on your mobile phone or personal computer, you need to make sure that you don't download or install untrustworthy applications or anything, don't click unknown links, don't give access to your device to any app even if it's for a short period because these things can compromise the security of your device and funds.

It's better if you use two different wallets with Electrum wallet software, one wallet for your PC and another wallet for your mobile phone/ device. Don't use a same wallet on both PC and mobile device because if one of two devices is compromised, you will lose all bitcoins.

The warning is more. Verify your Electrum wallet too, before using.

[GUIDE] How to Safely Download and Verify Electrum (https://bitcointalk.org/index.php?topic=5240594.0)
The paranoid user's security guide for using Electrum safely. (https://bitcointalk.org/index.php?topic=5456886.0)

OP, which crypto exactly do you mean? Not all wallets support all cryptocurrencies. Since you posted this thread in the Bitcoin discussion board, I assume you want a wallet for your Bitcoin? In that case I recommend electrum.

If you want a crypto wallet that supports other cryptocurrencies then I recommend only open source and non-custodial wallets like cakewallet. You could use a closed source wallet like Trustwallet but that requires the element of you trusting trustwallet, ironically.

I am shocked at the amount of false information and ignorance going around in this thread.  Lets start for the worst place to hold your coins...exchanges.  Then the second worse, hot wallets (mycelium, wasabi, coinomi etc).  Then you've got hardware wallets which I highly suggest Trezor wallets.  Some I know like BitBox, Cold Coin, and others ( I DO NOT recommend Ledger, they are garbage wallets).  Then the ultimate form of cold storage is either air gapped PC wallets or paper wallets.  These last two can be difficult to make and are not recommended for the masses.

I don't think so, the OP can choose to enable pruning.

I use an internet of around 50MB and it's been able to download the blocks, I've been using this internet package for 3 years and it's been serving me well.
Unstoppable wallet is a good wallet for both bitcoin and the altcoins it accepts, but I'm not a big fan of these mobile wallets, the most I can recommend is Bluewallet for mobile.

If you can't use Bitcoin Core, use Electrum, you will always have community support as it's the most recognized desktop wallet.

It should also be taken into account that Bitcoin Core validates its own transactions through downloaded blocks, without depending on any third-party node, while in Electrum and other wallets, you depend on third-party servers that may be spying on your balances by labeling activities (some servers may be running by companies like chainanalysis). At electrum, you even have the option to use your own full node to validate transactions, but it requires some skills to install servers like electrs (https://bitcointalk.org/index.php?topic=5477339.0).

Exchange accounts are not safe places to store any cryptocurrency.

Reminder: do not keep your money in online accounts (https://bitcointalk.org/index.php?topic=5421039.0)

People will have need to use hot wallets and it's not terrible if they know what to do. Store small fund in hot wallets to use, nothing more. Big and main fund must be in cold wallets.

Hot wallets, even hot, not safe in this format, must be open source wallets. If they choose close source wallets to use, it's bad.

They have many data leaks and last year, they did something stupid by launching Ledger Recovery Service.

edger Recovery - Send your (encrypted) recovery phrase to 3rd parties entities (https://bitcointalk.org/index.php?topic=5452900)
Ledger Recover: What The Hell is Happening? With aantonop and lopp. (https://www.youtube.com/watch?v=9scIevuymZM)

Electrum is best. You can cold storage

https://electrum.readthedocs.io/en/latest/coldstorage.html

If your wallet is installed in the same device you use to browse the internet, then it is prone to hacking and you cannot be too careful. You could download a phishing application or click on a link that has malware and lose your funds to scammers. Instead of trying to be too careful, store your funds in cold storage if it is worth so much, and use online wallets only for money you need for spending on the go.

OP wants a Bitcoin wallet, not a multi-coin crypto wallet like Coinomi, this is a bad choice, also Coinomi is not an open-source crypto wallet, I have lost my digital asset using that wallet before and at first, I thought the fault was all mine until later I started seeing other people having the same problem.

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Crypto wallets Like  Coinomi are a bad choice choice, if you really care about safety it is best to choose a open source non-custodial Crypto wallet, many people in this thread have already said the best ones, this doesn't count.

TRZEOR, Electrum, Blue wallet, Unstoppable, and every open source Bitcoin wallets out there are excellent choice, some called themselves open-source to mislead people, verify from people who have used such wallets before.

I verified that Electrum, Unstoppable, Trezor, Safepal, and Keystone are very reliable choices to store your Bitcoin.

My recommended Bitcoin wallet is Electrum, Blue Wallet is also included.
Electrum and Blue Wallet are wallets specifically for storing Bitcoin, not wallets that support more than one coin like other wallets mentioned in the discussion here.

Even if it's not a large amount, it's better not to use one wallet to store coins. Bitcoins should not be combined with other coins in the same wallet such as multi-coin wallets. If you ever want to exchange it, you can send it to the exchange address from the main wallet.
Fees, depending on conditions. Specifically for Bitcoin, it is not high if conditions are not constrained like now, high priority is only 12 sat/vB for transactions.

Yes you are right about the security, all security depends on each user. Although the security of the wallet is enhanced if the user is careless then there is no point in such security. The use of hardware wallets will also be useless if you store phrases carelessly and can be known to others.