Gold has its ups and downs like any other commodity. However, to paraphrase the ad, its never been worth nothing, which can’t be said about stocks. Same with land or anything tangible. If the thing in itself has intrinsic worth then it’s a solid investment, assuming you don’t try to get in at the top.
But, it's heavy. If the downfall descends into migratory or nomadic lifestyle, diamonds would be more desirable as a portable wealth.
Personally. I'm securing much brass and lead (in the .177 (Pellets), .17 and .223 calibers), and a good knife along with a handful of small diamonds, a water filter with hand pump, knowledge of salt deposits near the surface, fire starting tools...y'know small portable resources
It has however had negative value.