I'm not sure every people will use bitcoin in 2022, maybe only 5-20% from all people around the world that will use bitcoin in 2022. But if in 2022 the bitcoin's price is so high, i think it will make more people use bitcoin on that year.
If price is too high at that time then I don't think many people will able to afford to invest their money, so if you want to invest then this is the right time to do.