But if you're going to use them as an exchange, there's no problem but AFAIK, you'll be required to comply and be approved through KYC.
The problem is the complete lack of privacy or security, your data being shared and sold across numerous third parties, and your activities being tracked, monitored, and reported to your government. If you are happy with all of that, then you can use Coinbase to trade coins, but you should remove any and all coins from it as soon as your trades are complete.
pls use an open-source wallet like Electrum or Trust wallet.
Trust wallet is not open source and is owned by Binance, so an all-round terrible choice of wallet.