[pontus]

So stuff like precious metals, commodities (energy, corn, pork, ...), stocks that don't pay dividends, etc are then also equally worthless?

I don't think holding a barrel of oil or a bar of gold, or a share of Berkshire Hathaway will generate any income for me. I'd need to sell it to someone else for me to get my money back.

[saalweachter]

You're presuming that every purchase of a commodity -- even gold -- is an investment in it.

People also purchase commodities to consume them. The commodity exits the world o' commodities and the money stays, to be returned to investors.