I do think the concept of blockchain has the possiblity to disrupt traditional banks but i doubt it will happen. Banks have plenty of power and even as slow and archaic a system they might be in many countires they are so engained into the system are almost too big to fail. They will probably also adopt blockchain products and provide a hybrid system that is cheaper than the current system and be able to retain customers out of lazyniess, loyalty and sheer convenience

Lets face it using crypto is a pain, its an clucky and its an inconvenience to the ordinary man on the ground. For us to completely disupt banks with crypto it will take a systematic change in thinking which will only happen over generations as we refine the tech as well as people becoming more accustom to it