It depends. If you are a day trader, it's probably easier to keep your coins in the exchange, you use.
If you are a holder and you trust your exchange you'd probably keep them there. The fact is that online wallets are vulnerable to hackers.
It has happened before sometimes and people lost their money.
So I think it's safer to keep them in your cold wallet, on an old PC you keep always offline or buy a hardware wallet.

Hi fire rab1

The greek translation is ready.
Please, pm me if you'de like any changes.

Link : https://bitcointalk.org/index.php?topic=2747877.0

Kind regards

Keeping Ripple is a problem. Ripple was made and it is owned by a private company.
I find it strange but you have to pay 20XRP for the wallet, which brings extra money to the company.
This is the reason why the investors keep them in the exchange's wallet.
If you trust the exchange you use, you can do it too, I don't, because they can be hacked and you can lose your money and your investment.

My favorite coins are bitcoin because I believe is the grandfather of all coins and will continue strong in the future. 
ETH, because has an integrated programming language in it and great opportunities.
LTC because of the small fees it's charging when sending money.
XMR because it was the first I bought at $5 each and it gave me a lot of money.
I suggest you invest in some tokens too. Few people invest in it and so far they give great profits to the investors.

 

If you want to invest long term, this is the right moment.
ETH's price will grow fast the coming years and I suggest you not losing the opportunity to buy some.
If you want a quick profit, ETH is not for you, search for some low valued alts, and good luck because their price is unstable.
If you'll see the historical prices of the major 10 coins you'll notice that holders were always successful in their investments.

As long as you own the private keys your money is safe.
Take into your consideration that the coins are not in your etherwallet nor in any other kind of wallet.
The wallet stores the address the private keys and encrypts them if you use a password.
All your money are stored in the blockchain.
Having the private key you prove that the coins belong to you and that you have the right to send them wherever you wish.

It seems that you have never used an exchange before. if you are already registered you have luck because they don't accept new registrations.
Go there and exchange directly BTC/ETH. You are going to pay fees for the exchange and for sending them to your private wallet.
Changelly is an other option you can convert them directly from ETH to BTC without registration.
If I were you, I would keep them as ETH in my MEW. Ethereum is growing faster than BTC.

Litecoin is a great coin having very low transaction fees. It worths sending money using it instead of bitcoin.
I think Charlie Lee wanted to speculate because of the coins growth and I believe this thing was wrong.
It surpassed $300 for almost 10 days and I am sure it will return to its previous growth very soon.
It seems that the lightning project will be issued to this coin too and it will make it powerful in the future.

Welcome to the new world of cryptocurrency. I suggest you not doing anything the following weeks, and start reading this forum. Read about PC security, what a wallet is and how to use it properly. Learn how to distinguish genuine websites from their fake copies. Many friends in this Forum lost their money because of making mistakes. Don't repeat the same false moves. Your friend was lucky enough to make money, unfortunately, it can't happen to all of us. Don't invest more money than you can afford to lose.

We have to take into our consideration that Ripple's coin circulation is 400 more than that of Ethereum.
This is the reason why it becomes so quick in the 2nd position of the market cap, having so low price.
Ripple was created for bank transactions and I think that is premined. It wasn't made to change the financial system as Satoshi and others imagined but to give profits to its owners Ripple INC. Support Ethereum that is mined by its people and belongs to them.

The fact that cryptocurrencies have an open source code (this is actually the right way) makes them vulnerable to copies.
You don't have to be a professional programmer nowadays to create a new coin.
A young kid can create a new coin over a weekend and issue it to the market. That is what is happening to many coins and probably to Signatum too.
That's why is significant to research before buying and not following rumors.

My opinion is to keep each coin in its own wallet. I prefer to use these proposed by the developers of the cryptos.
I know this is not convenient but for me, safety comes first.
MyEtherWallet is fine for ERC20 based coins and if you are a holder use a cold wallet. I don't trust the ones offered for many coins unless it is a hardware wallet like ledger or trezor.
So for more safety it would be better to use a hardware wallet.

This is not a crash. It would be if we had a real price drop of 50% or more in a day.
It's true that investors are easy manipulated by the news and they react selling. Actually is a price correction and an opportunity to all of us to buy more coins at a cheaper price.
I don't like the fact that the cryptomarket is so vulnerable and a co-ordinated operation of the world bank could send us to history.

As long as the power cost is less than the daily profit the miners will continue their work.
That means that when the mining difficulty increases the value of the coin should be increasing too.
The miners are also gaining money confirming the transactions. In the future, it is expected that the percentage of the fee gains will be increased. When the limit is reached the miners will continue to confirm the transactions and get money from there.

Electrum was vulnerable but not if you used an offline computer as cold wallet and another online (watch only) for the transactions.
I think you can still use it this way, it is the safest option. If you have many coins, buy a hardware wallet or for more safety use paper wallets. They are still usable.

In 5 years some of the alts we know today will collapse and new ones will be issued.
The investors will be much more than today because of the volatility of the market and the promising high gains. What is essential to happen is the use of the cryptos in our daily life.
It is mentioned before, and I believe it that the start will be from the unbanked populations of the so-named 3rd world.
I hope that the developer works more the security of the coins. Many lose their money and it is unfair.

This is a very good commend eldrin. I've noticed it some months ago (I'm new in cryptos) and this is actually my tactic.
I've split initially my portfolio into 3 parts 60-20-20 ( BTC-ETH-LTC) and it's obvious today that the growth isn't equal.
Three months later the portfolio is 48-28-24 and the value is tripled. I think if it worths selling a portion of one coin to keep the balance or take some of the profit to invest in other coins too.

It seems that some coins are connected each other. Check the price charts of Litecoin and Bitcoin and you will see it for yourself.
Bitcoin is the father of all cryptos and the first coin issued. If you ask someone if he knows what digital money is, he will answer Bitcoin.
If Bitcoin's bubble pops, it will definitely affect the other alts price, but cryptocurrencies won't disappear.
Cryptocurrency is the next step in the monetary system after paper money and credit cards. It is to stay.