No one can deny, the birth and existence of bitcoin is a threat to the rudimentary technology of banks. When asked, where would you choose to preserve your assets, gold, bank or bitcoin? As a loyal citizen, I will choose bitcoin!
Yeah, banks are slowly turning as old technology as they are not as competitive as what new payment systems are offering to ensure all the demands of common people. When something is outdated then we cannot expect that to survive, time will washout such things. This is what exactly going to happen with traditional banks but probably it may take centuries of time as bitcoin needs same kind of time to reach most people of this world's population.