It's not the gold itself that matters, it's the hard constraint on the bank's ability to create currency.
And, again, so what? That constraint creates other problems and, in the end, relies on faith that the gold promised by the notes is sitting somewhere. Add in the fact that transactions are digital and it's even more disconnected from the "reality". Your physical constraints don't matter if the same people that would be managing the amount of leverage and auditing on the gold reserves are the people that are currently managing the fiat currency.
You can still get a bubble by people claiming to have gold that they really don't, and then the bubble and the entire fucking economy shitting itself when there's a "correction" when people find out that some of the gold has been, ahem, misplaced.
Meanwhile, the actual, physical supply of gold becomes a huge variable that can swing the global economies this way and that despite having little to no connection to the actual productivity going on. Do you want famines because someone hordes gold and refuses to exchange it (driving up the price of gold, which lets them leverage it for, say, bombs through backchannels)?
I'm not saying that fiat money is a good thing, I'm saying that the gold standard is not the panacea people think. You want a stable backing that prevents irresponsible fiat currency managers from manipulating things, but gold is *not good* for that.
Crypto, btw, doesn't solve any of this.
Agreed. Crypto solves one problem -- facilitating exchange in goods and services by people who don't really care about the stability of the currency underneath, because they're otherwise blocked from trading those goods and services at all.
edit: its primary value is its ability to escape US government controls on money flows, but there's no way that's worth $60K/bitcoin. That's speculators piling in.
You could say that about lots of stocks, too. I'm not a fan of the "magic hand of the market pricing things according to their value", but you can't hold that The Magic Market has priced in a correct value of stocks and *not* hold the same for BitCoin. It does have value, and it is volatile. We have words for that already.