This is the thing, they will be banned from!
Japan has already been doing this for years and this is a reason why FTX Japan users still have their money!
There is a bit of nuance here
- you deposit your money in a bank but you expect interest, how would that work if the bank is not allowed to touch your money
- you deposit coins on an exchange knowing that you can withdraw them at any time but you don't demand interest and they get fees from you
- you deposit coins for 100% APY then you know those coins are going to be lend
What those laws require is that unless the user specifically allows you to play with his money you must keep every deposit safe and untouched.
Rather than a bank, think of it like your stock broker, imagine you call him to liquidate some AAPL shares and he tells you everything is in SBNY (signature bank).
Yeah right!