I never understood the fascination with the gold standard. Gold has more intrinsic value in electronics than as a currency. The relationship between a state currency (dollar, yen, peso, whatever Russia uses) and gold is artificial. It's only fitting the relative value of one currency to another is based on Excel sheets and voodoo. Gold just became popular quite literally because it's shiny and doesn't "rust". Both those characteristics can be explained with chemistry. Then it became valuable because it was considered rare. Similar story with diamonds. I can buy a diamond cutting wheel for my Dremel for cheap. But jewelry grade diamonds cost thousands because somebody decided oooooo shiny. The color purple became the color of royalty because it was the most difficult dye to produce, and therefore had more value than yellow which can come from rubbing the next dandelion you see.
The people worried about living post-collapse should be more interested in stocking up on that currency, the proverbial beans, bullets, bandages. Hell, I bet if you farmed tobacco and potatoes, you could be the post-apocalyptic Jeff Bezos selling cigarettes and vodka.