1 oz. of gold doesn't change from day to day, rather, only people's opinion of it changes. In that sense, is there anything you can think of that people would want as much or more in the future than they do today? I can think of maybe 1 thing, sex, but I don't even want to begin to imagine how a system like that would work haha.

Ultimately I agree that fiat currency is a necessary evil because of the ability to expand with the economy.