Earlier quoted context omitted.
Gold. The purchasing power of Gold has been remarkably consistent over the long term. That is, if you convert the gold to dollars, how many eggs could you buy? To learn more, read up on the work of Keith Weiner of Monetary Metals, or listen to the early episodes of his podcast “The Gold Exchange”.
The problem with gold is that it's price fluctuates just like any other commodity. The practical uses of gold accounts for only ~8% of gold mined, while half is for vanity (jewelry, a luxury product) and the rest for speculation and reserves. Similar to fiat, most of the value in gold is in people believing it has value.
vanity (jewelry, a luxury product)
Jewelry traditionally functioned as a rough store of value because it's easy to sell quickly (albeit at a steep discount), and it makes a remarkably reliable Veblen good, as a glance at the Oval Office will demonstrate.