It was actually Gold and Silver.
But the one world currency may be electronic, but I do not see it being a crypto, as crypto is backed by nothing but thin air. Bitcoin and Ethereum had a huge following as people rode the wave, now that inflation/recession is nearing people are jumping ship. Gold is in a breakout pattern.
At one time everything was based on barter, it was something you could feel/touch, then came pretty things that were rare it was added to the barter (gold/silver, silk, pearls, gems )Later came physical paper currency, which was backed by precious metals. Somewhere in time most of the gold vanished probable ended up in the hands of corrupt politicians, but governments backed these Fiat currencies with a promise and taxing the people to ensure its value.
Ask yourself, "Who owns the crypto currencies " how many of their creators have been hauled off to jail, Now they are coming out with NTF's do you have any idea what an NTF is, well it may be a picture of a painting, a cartoon character, and they start off selling it for say $3, later is has a value of $300, really I can take my own picture. That my friend is what crypto is (nothing) They keep coming up with new ways to take money from the naive, who then whine about how much they lost.