NEVER hold your coins at an exchange. They can at any time deactivate your account and just steal your coins. If you have your coins at an exchange THEY ARE NOT YOUR COINS.

Why do you want to keep your money in an exchange without a deal, so you'd better put your money in a wallet that controls the private key to protect your crypto coin.

Of course Wallet is more safe than exchanges, if exchanges is gonna be hacked all coins gonna be took from others and u ll let without anything, a lot of times this happened before.

it's depends on your self, if you want to use your token/coins for daily trading you should keep on exchange, if you want to use it for long-term investment then keep it in the wallet would be the best decision.

If you trade coins every day, you can keep them on the exchange.  And if you have a large number of coins for a long time, it is safer to keep them on your wallet.  Many coins have separate wallets.  It is also convenient to use MEV.

i prefer to keep my coins in a wallet and send them to exchanges once i want to trade it...i think that keep couns in exchanges in not realy a safe way

Exchanges are not wallets. They are adding counterparty risks. It's way safer to use a hardware wallet like Ledger Nano S, def worth the money.

I am not holding a one coin in one wallet, but it sounds logic for me to create new wallet for every coin more secure

I think that most investors use wallets and this is correct. Almost every post or article about security says that you can not keep your tokens on the exchange - this is fraught with the loss of all your investments. This has already happened and to ignore this warning would be foolish.