Bitcoin would likely be for more affluent enjoying the "reality" in their enclaves/citadels, and the majority would live using doge, shib, mana (or name some other s-coin example) in the virtual worlds (apart from the time spent on dreadful "work" in Amazon warehouses, Walmart, etc.)
Bitcoin is quite usable for casual commerce at $1m/coin with L2 like Lightning. But that will start to have trouble at $100m/coin. But Bitcoin can adapt. I foresee a (soft/hard) fork for sub-sat values coming in the near future.
In "real" world, yes, my point was that VR worlds usage might be in other tokens, as they are 'native' for particular worlds, as MANA is for Decentraland.
It is a 'currency' of that particular world.
I think that large % of commerce might at some point occur in the VR "worlds", but i could be wrong about that, of course.
Now you can see why Facebook was pushing so hard on getting govt approval for their Libre currency... for their stupid Metaverse.