In future, when bitcoin will dominate in sending - receiving - depositing funds kind of bank works, I believe banks will start different type of banking like providing safe vault or mortgage kind of services alone. Banks will fall.
I think you're free to think about the future of bitcoin, but when fiat continues to be the main currency in the world and in every country, it will not be possible for bitcoin to be able to make the banks disappear, one thing is certain that if bitcoin want to beat the bank, they have to beat fiat first