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.
If bitcoin will take place the fiat money, I could not imagine its effect. But surely, there will be lots of changes. Of course, there could be advantages and there are also disadvantages. But for me, maybe it still will not happen at 2022. Maybe the world is still not ready at that time.