From the point of view of what's more secure I think exchanges and open web wallets are the same. It's easy to hack both. Desktop wallets are little bit more secure but still not perfect. But where to keep crypto depends on your aims.

I'd better keep all my assets on the stock exchange, as it allows you to quickly respond to what's happening and to change prices, you can at any time sell or buy the necessary coins! and such a stock exchange as Binance, is not inferior to wallets, so I recommend!

If you pay attention, exactly one year ago the list of the best exchanges was completely different. This suggests that any exchange may eventually fail or be hacked. Therefore, I would recommend storing fixed assets on cold wallets, and on exchanges to keep only what you are going to sell or exchange - so it will be safer for you. Also try to use official coin purses, as multi-purses may not be very reliable for long-term storage.

I never ever trust a central stock exchange. I do not recommend it to anyone. everyone is responsible for their own money. attract long-term investments

As for me, I prefer to keep my money safe on wallet, because there are more cases of exchange's fail than wallet fail.

I suggest to open a wallet and keep your coin till it price becomes high.  There is no assurance that the exchange will no close even though it has many traders or it might fail and your coin will not be refund. But when you put it on exchange there's no problem or hassle on trading or transferring your coin.

Will for me there lot of news that exchanger is been hack. Thats why i prefer to choose a wallet like metamask and myetherwallet.

Keeping one's coin on exchange sites can sometimes be risky, because there are some of these sites that are liable to hack. Although, exchange site will enable you to trade your coin at any time. I prefer my wallet more.

There are tokens or coins to sell and to hold.
Those tokens you want to hold long will remain in your wallet for better security.
but those token you want to have day trade or targetting a price to sell in the near future is better at an exchange.
just be careful in sending tokens from wallet to exchange! make sure the address is right.

I prefered wallet. Because i use for now myeherwallet compatible in ERC20 . All tokens are compatible in erc20 i can recieve.