I'm sure it can not, bitcoin can not replace the bank in the future. because bitcoin is a digital currency that can be used by bitcoiners only, I'm sure people who do not know about bitcoin feel confused to use it.
Well, bitcoin cannot really replace bank as of today, but we don't know the possibility in the future, we cannot conclude future now as it is still early to see the future, we don't know what will happen in the next coming years right? It might happen that bitcoin and bank will unite as one right.