The reason why banks will always be against cryptocurrencies is that, since btc in its nature is a decentralized cryptocurrency and that they will not get anything from it when they allow all people to accept it.
Well in my opinion, banks are not really against cryptocurrencies, as what other said some banks are accepting it, and i think banks also gains from it. And bank has nothing to do with the crypto Because it is the choice of the people, whether crypto or the bank.