they 'll probably be superseded by some form of quantumly-entangled currency, since their crypto algorithms will have become obsolete. But there is a need for a

they 'll probably be superseded by some form of quantumly-entangled currency, since their crypto algorithms will have become obsolete. But there is a need for a stable form of wealth (like gold), and fiat currencies are increasingly being used as mediums of control , a form of power that is even unelected. I don't think future societies will put up with that.