Consider this hypothetical scenario, let’s say all other currencies, except for bitcoin and monero, disappear overnight. We only have bitcoin and monero left. Do you think more people will want to start using monero instead of bitcoin and thus start paying more and more bitcoin in exchange for monero?

Personally, I don’t think so. Imo monero’s use case is much more niche than bitcoin. If bitcoin is the internet of money, then monero is like TOR (much lower adoption)