At current situation it can not make any bank disappear but after many years it may not be predicted. It may also make banks disappear by using digital money not physical one....
Today, banks also use the money in the form of physical and digital. Therefore, banks are already operating in the future. A bitcoin does not have the capacity that has the bank, and even more will not be able to provide the same services as the bank.
yes banks are going to operate for a long time. and may be banks will continue tell all the people of the world start using bitcoin and tell the facilities of bitcoin become available in all over the world and i think it will take a lot of time because still a lot of people do not know about about bitcoin and most of the people know about bitcoin but still they do not want to invest in bitcoin.