In every business it's the same. When new technology comes up the existing businesses will evolve or die. And obviously new businesses will also rise strong.
Same happened with mp3 and music industry...
Yes this is completely true as it's evident from history that whenever any new technology enters the market the older technology needs to be evolved or it will die so this will also happen in this era with banks as cryptocurrencies are the future of financial market all over the world so it can help either banks to evolve or it can kill our banking system which are prevalent in our today's world .
Whatever this new technology is, banks will also find a way to evolve, they always follow the trend and that's the reason why they cannot be replaced. It is also the safest way of storing your money and it's proven all the time.