If a virtual or augmented reality world is the future, we had better pray it isn't controlled by the sociopathic Facebook whose thirst for conflict and lies has infected so many millions of people with delusional beliefs!

A better idea would be some sort of federated system, very much like email is underneath it all.

No, not a silly blockchain, but a distributed system where individuals or groups share areas that they have constructed without the need for a single central provider.