Its not that gold is worthless, but it might be worth significantly less for you. A sovereign nation could institute a recall of gold devaluing the commodity[1]. A different sovereign nation could invade and take the gold by force.

Both of which have precedent in the last 100 years. Ofcourse if you only read history from the perspective of the winners, gold is always a good long term investment.

[1] https://en.wikipedia.org/wiki/Executive_Order_6102

The great thing about gold is that it's easy to hide. From what I'm reading about the EO6102, most people just didn't obey it and kept the gold.

Just going off on a tangent, but Vikings seemed to prefer silver to gold. It’s hard to entangle cause and effect and silver mining in the Middle East around that time, though.