Any individual can do whatever they want. I'm not contesting that. The point is, is that they are all already measured in USD because that's what the UOA is. A UOA is not a personal thing. A UOA is what a *society prices goods in.* The price of all commodities and all other currencies are set against USD. And if a pairing EVER deviates from that, traders jump in to pull them back in line. Because there's a million traders waiting for a deviation to happen so that they can get fiat.