it’s very clear that cryptocurrency is not going to be replacing the banks at all. The only thing is that the government will keep trying as much as possible to see if they can regulate the cryptocurrency market/ecosystem. They are able to regulate part of it, because of the centralized exchanges that we have now. Why they are still unable to take over the whole ecosystem is because the market has become really huge now with miners across the world, and so many people making use of decentralized exchanges.
If it was very easy, then they would have have done everything possible to put an end to the cryptocurrency we known today. Finally, bitcoin has its own and I believe that it is accomplishing that, while fiat and the banks are on a different lane.
I do agree that banks and politicians could get together and try to destroy what we have in the crypto world, but I also believe that there is a good chance we may never have anything even remotely similar to that as well. I can't predict what they will do, I am assuming that they would be doing a lot of things to stop it, but then they do not even try.
I get that they may fail even if they try but I assumed they would at least try to ban it at least. Look at china, they keep having these "crypto is banned" news all the time and it sort of works, sure they can't stop it, but they are at least trying to do it, which means that other nations could try to ban it as well, and yet we do not see them trying that at all.