The restrictions on crypto are coming from regulators, not the banks, and the reason regulators aren't happy is due to the volume of criminal transactions, tax avoidance and scams enabled by crypto.
The reason the banks don't care is because at both ends of most crypto transactions you will find, er, a bank account. Crypto is only useful to the extent that it has real currency value, those Nigerian scammers and many others using crypto for transfers are just using cyrpto as an intermediate step to avoid pesky laws. That's fine as far as the banks are concerned because that's more money flowing into their systems.
The restrictions on crypto are coming from regulators, not the banks, and the reason regulators aren't happy is due to the volume of criminal transactions, tax avoidance and scams enabled by crypto.
The reason the banks don't care is because at both ends of most crypto transactions you will find, er, a bank account. Crypto is only useful to the extent that it has real currency value, those Nigerian scammers and many others using crypto for transfers are just using cyrpto as an intermediate step to avoid pesky laws. That's fine as far as the banks are concerned because that's more money flowing into their systems.