hardware wallet in case you have few tens of usd to spare and invest in that. If you hold only little value crypto currencies, just choose the trustworthy exchange or online wallet

Exchanges are not suitable for storage! In the light of recent events, hacker attacks can easily deprive you of your savings. The simplest and safest wallet is MEW. When creating a complex password, you do not have to worry about your savings. You can also use the wallets of WAVES in NEO for altcoyins

Some users set a separate purse for each crypto currency (for example, Electrum-Dash or Ethereum Wallet). This approach undoubtedly provides a safe way to store digital currencies, because each of these wallets gives you the opportunity to control the private key. If the latter is stored in a secure place (for example, written on paper and or stored on a flash device that is always offline), then you can be 100% sure of the safety of digital savings.

There is none of them without its both merits and demerits. It just depends on what you personally shall be doing with your funds at a given period. If you are for an instance having a great deal in Daily tradings, living your funds with the Exchanges with which you are transacting with could be the best choice at that moment, but if you are only investing in some coins for hold, I feel keeping your coins in your wallet would have been much okay, and when you need to cash out, you can endeavor to follow the few steps of confirmation  and get your transaction done. The reason been that living your funds with exchanges for long might be risky at times in any case, any inevitable occurs at the long run.

Yes I prefer a wallet compared to an exchange. Also most altcoins wallet now will give you staking rewards for holding many coins and just letting it open,

It is better to hold coins on cold wallets, of course, but if you have too many coins, it is rather difficult to have wallets for each coin. In this case it is very convenient to hold all your crypto on exchange. I don't think you should worry about the safety of your funds if you hold them on top exchanges like Bitfinex or Bittrex.

Here a lot depends on how you trade. If very often you will need to keep on the stock exchanges.And if you bought a coin for a year then of course you'd better start a purse

If you really store your coins on an exchange, then you are a retarded.

But well, storing on an online wallet is not safe enough neither. I prefere to hold them all on my hardware wallet, it is ten times more secure.

I think there is no need to keep ur coins/token in an Exchange. There have been numerous cases when people simply lost the money because the exchange was hacked or the exchange closed. As for me, u can store ur coins in a wallet where u have full access.

keeping coins in exchange could expose you investment to risk such as lost of coins due to hacking attacks but keep in mind that if you are going to trade it soon it's a good choice to keep your coins in exchange, holding coins for a long time should be done in wallets.