[AnthonyMouse]

One of the things banks do is to issue loans. That's fine.

Another thing banks do is, Alice is in New York and wants to pay Bob who is in Miami, or Kyiv, so instead of getting on a plane with a sack full of Benjamins she tells the bank to send money to Bob. Cryptocurrency is clearly an alternative way of doing this, with the advantage that then there is no middleman to refuse the transaction when the bank is being leaned on by a despot.