In practice, most currencies are inflationary because more money is continuously being made. Which means that early obtainers of money actually lose value holdi

In practice, most currencies are inflationary because more money is continuously being made. Which means that early obtainers of money actually lose value holding it, instead of gaining more. So currencies would be the opposite of a Ponzi. On the other hand, the current economy model which relies on continuous growth, might reasonably fit some definitions of a Ponzi.