However, I don't think Bitcoin or any crypto is at that point yet. Maybe in a few decades, but too few people accept it and only a few people are using it in comparison to the world population.
I am sure that crypto currency, if it gets big enough,would be able to bring some damage to banks because the returns could end up being stronger than what banks can offer. Also, banks offer centralization. If decentralization is the future, then it makes sense that banks are would be fearful.