They can't stop crypto because it is almost impossible to stop people accessing the internet with out damaging the economy, they will try to stop btc and other big cryptos but that will just lead to the birth of others that are anonymous. Most banks and governments don’t like the currency aspect of it because they can't control it as easily as fiat you can create fiat with little resistance (QE) but it is impossible to do so if there is o control over supply like in crypto.
But I think some governments might implement the blockchain technology for other things like the internet on a blockchain rather than how it is now.