Crypto banks are organizations for lazy people who are too lazy to install wallets on their devices.
But here the crypto exchange can solve this problem completely.
if ever there were such thing as crypto banks i think they are more secure than a regular wallet or exchanges because they might work just like a bank . they can regulate your crypto and they will have personal access to the transaction that anyone had made . plus they may also have other perks like daily , monthly and yearly interest which means you can earn some profit aside from the existing earnings from the volatility of the market .