The current trend of blockchain is very high, couple with it's ability to execute millions transactions within seconds, few transactions cost and no third party is require or paper signing. All transactions recorded and kept open, taking alway cross border and languages barrier, excellent in e commences. So many features to change the world. My emphasis is can blockchain has the capacity to replace bank?
That ways is still possible, but it will need times and a big effort to makes people fully accept the blockchain technology.
Without the trust from people just like regular banking does, than it would be hard to achieve that goal.