Something like a very hefty tax for fiat/crypto exchanges would probably already solve the whole problem if a ban is the end goal. People would still be able to

Something like a very hefty tax for fiat/crypto exchanges would probably already solve the whole problem if a ban is the end goal. People would still be able to use it freely for the applications crypto enthusiasts claim it is meant for (like using it as a decentralized currency for payment). But in reality the hype (and with that, its value) would probably crash because it would not longer be as attractive for the money gambling it is actually used for. Just a thought, I'm probably overlooking something.