Should happen. Won't happen. Not ever again. Why? Politicians.
The possible exception? The aftermath of a titanic economic collapse when lots of people die most likely from starvation.

"...Ever since the creation of the Byzantine monetary system by Constantine in 312, its pivot had been golden solidus, a coinage whose nominal value was equal to its intrinsic value, as is proven by the Theodosian Code.[55] Solidus became a highly priced and stable means of storing and transferring values[56] Novel 16 of Valentinian III punished with death anyone who dared "refuse or reduce a gold solidus of good weight."[57]..."
https://en.wikipedia.org/wiki/Bezant

Actually gold coins powered the Byzantine empire for a thousand years.

There is a technical reason why pure gold is unsuitable as currency, it is too soft therefore malleable and subject to wear.
(Apology to Rothbard if the vid which I have not watched dealt with that point.)