If cryptocurrency is to be spread everywhere then it is possible because cryptocurrency is not acceptable everywhere. Suppose you get paid in cryptocurrency for what you have done, but what do you do when you go to a hotel to buy food? So in the current context we need real currency. So we can't imagine our daily life without banks.
That is the fact. Although in some ways bitcoin offers innovations and solutions that cannot be resolved by banks, we still need banks to conduct general transactions. We know that the adoption of bitcoin and other cryptocurrency is still not very widespread, facilities and infrastructure are also not fully supported in some areas, apart from that human resources are also not fully ready to accept this evolution.
So I think the two will go hand in hand and complement each other, crypto will be an important alternative for the economic world.