30/ Ah ok, what if money expires/rots like a gift card? Tbh then I think a money renewal market would appear, where you could turn in your About To Expire money, and get Fresh Money. And when you want to use it the… let’s call it a bank… would give you About To Expire money. And for this they would for sure find a way to make “money”. Either in an “exchange fee” or something like it. As long as you get in fresh money all the time you are golden. Oh no, this sounds like cryptocurrency exchanges.