I think the idea of crypto is that we will not need banks anymore. If crypto gets bigger, more scalable and more widely accepted it can be used for payment and you won't need a bank. What would you want to use a bank for?
i think platforms are already emerging where Freedom from Merchant Banks and Processors are being assured, like MFChain, which added to this, assures a platform where all cryptocurrencies and be exchanged between Merchants and Customers. Lets watch and see!