Historically this has been the case. It’s possible that changes but I don’t see it. Trade is more efficient when everyone uses the same currency. And monero can’t scale so it can’t ever be adopted in a meaningful way. Even if it’s as great as people claim it to be, there’s not enough space on the blockchain for significant adoption. So people are most likely going to gravitate to the best money that is most commonly used. Even though dollars are shit, people use it more than any other currency because it’s so common all over the world. It’s very convenient to go to Argentina and be able to find merchants who accept dollars. I can see a world where merchants are accepting bitcoin all over the world. I can’t see that with monero because it can’t meet that large of a demand. Can’t see that with gold because it’s heavy and you cant travel with it in large quantities. Gold is also a pain in the ass to verify.