Silvio Gesell proposed the idea of FreeMoney, which posited that money loses value over time. As such, this can accelerate circulation, as no one would want to bear the cost of holding on to currency.
Along the same lines, in a hypothetical situation where every citizen is given a certain amount of cash in their hands, with a caveat that the money will disappear (or not be valid) after a certain time (say 48 hours), where would it ultimately flow to?
Would love to hear your opinions.