Money today is already 'mostly digital'. And yes, your bank doesn't have all the money required to pay everyone out at the same time. That's 'fractional reserv

Money today is already 'mostly digital'. And yes, your bank doesn't have all the money required to pay everyone out at the same time. That's 'fractional reserve lending'. But at the same time, the money it does have is not all cash. [1] https://en.wikipedia.org/wiki/Money_supply https://en.wikipedia.org/wiki/Money_supply