Nope, many places have flat out banned all crypto transactions and the holding / using of crypto. And wait for it.....nothing happened.
The EU can ban it, and wait for it....nothing will happen.
It's like banning anything else, people will do what they want to do.
I love it when governments ban crypto, they make clowns of themselves and that can only be a good thing, because it makes people respect them less.
People will transact outside of the system, pay less taxes and the nation states will get skinny.
In case of a ban within the EU the BTC price would be much higher within the EU than outside of it. Black market prices always come at a premium.
The EU is not Nigeria or India. Their banking system is better connected to the rest of the world, so I don't think massive market inefficiencies will emerge as people will be able to buy it outside of the EU by sending their fiat caca to a seller on Bisq, RoboSats or similar.