Nobody cares about that. “Backing” currency is layering illusions on top of each other. The only thing that any currency is really backed by is people’s willingness to take it in exchange for goods and services. Dollars only have the value we give them. Gold only has the value we give it. Crypto also ONLY has the value people give it.
Funny you mention anachronism while touting gold backed currency.
Stablecoins bridge the worlds of cryptocurrency and everyday fiat currency because their prices are pegged to a reserve asset like the U.S. dollar or gold. This dramatically reduces volatility compared to something like Bitcoin and results in a form of digital money that is better suited to everything from day-to-day commerce to making transfers between exchanges.
The combination of traditional-asset stability with digital-asset flexibility has proven to be a wildly popular idea. Billions of dollars in value have flowed into stablecoins like USD Coin (USDC) as they've become some of the most popular ways to store and trade value in the crypto ecosystem.