It is said that bitcoin will destroy the fiat system but i believe that if this happens the world will change completly because banks and a lot of things will go out of market.
yes, I believe in 2022 bitcoin has been used by everyone in the world, I think it will be used by a lot of people by then because the bitcoin infrastructure should be complete by then i guess.And then more shops adopt bitcoin causing a massive increase in people that will use it.