I personally don't think that Bitcoin can make Banks disappear. Banks will never let them self be disappeared by something else.
But the banks aren't invisible and can go bankrupt. And we live in a world where anything can so maybe the Bitcoin can make them disappear, but i don't so.
As long as this world is controlled by the government banks will always be here to serve us, it's true that there banks who gets bankrupt but that would not solely mean that the entire banking industry is not profitable. Banks has exist for many decades already and it's part of the history already therefore it cannot be replace by bitcoin which is stil making a history.
We all know that this world is centralized as it's run by the government and that can ensure peace and order than a decentralized thing which some are hoping to happen.
I will have to agree with that.
Those bank will not fall just like that. Example is China, banning some industry and some places to use bitcoin and then what? Suddenly PBOC says they will create their own blockchain? What the hell?