I suppose if we wanted, we meaning society, we'd all get a gold shaver and go to stores who'll accept gold in payment. We'll weight it out in gold shavings. Of course, nowadays, we just have to pair gold with Bitcoin. What I find interesting is that gold & Bitcoin get quoted in fiat dollars.. How do we get fiat out of the equation? It'll be interesting to see what happens when/if there's an announcement about a Stable Coin that's backed by gold/Bitcoin.