need to know that bitcoin and bank systems are different, as well as others. I think they all have their advantages. With the existence of new technology and also new discoveries, it does not mean that old technology is also abandoned because each technology has its own advantages. although now the development of technology is growing rapidly but many people are not able to accept it well. I think it will be difficult even to wait for this to happen in the next few years.
Some will lose their functions but some will retain and still exists. Banks and fiat money still have their purpose and value in the community that we can never think will vanish and replace by crypto and blockchain technology. I'm for sure this will never happen and what we gonna see is adoption by the banks and they have to just for the sake of fulfilling the needs of the people and their old clients.