Im sure the bitcoin will replace any banking system, too much lack in it, and i think right now bitcoin is only great on campaign of decentralized exchange.
all the rest still in the bank system, we need to great at all that already exist in the banking system. anyway, there's still a lot people which more pros on banking system than bitcoin.
Well, having this new innovation in the real world, we may expect that this prediction would somehow come into reality. But it's not that easy to change the recent banking system because they have to be broad in gathering information on how this system works if they are going to adopt this technology.