Well it needs to be somewhat reasonable for that to work. It might not matter much whether money has a half-life of 20 or 30 years, but if it becomes 10 days or

Well it needs to be somewhat reasonable for that to work. It might not matter much whether money has a half-life of 20 or 30 years, but if it becomes 10 days or 1000 years then that is a quite significant change in the way that money works.