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Re:Central Bank Digital Currencies are coming by jariel on Sunday October 18, 2020 @07:23PM (#24821945)
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

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