I know people out there who have invested a lot in gold under the belief that in the event of like complete societal collapse or hyperinflation, they could use it for purchasing.
I have the hunch it’s a scam, but I haven’t learned enough monetary theory, business, or economics to understand why.
Compare gold to the other elements on the periodic table as a medium to store value and you’ll see why it is used for this task.
It is non toxic, it can be easily held and transported, it is non reactive (it won’t rust or combust), it is relatively rare, it is dense (a lot of gold fills a small space) and, well like others have said, it’s shiny. It can be easily moulded and forgotten about for millennia and still be the same way it was last used (look at Viking hordes as an example) few other things can do this, maybe diamonds? But they can not be recombined again like gold