That is the non idiotic thing about gold, since it is not fiat, is not easy to produce, and it is easy to verify, it can be used as a currency in less stable times/places. It’s a redundancy. Perhaps bitcoin satisfies many of these properties without the high costs to secure and move gold, but it needs electricity and a network?

https://www.macrotrends.net/1335/dollar-vs-gold-comparison-l...

Gold is a fiat currency because it has no inherent value.