i don't think that Bitcoin will be used by almost everyone in 2022 or in 2030 , it's not about when ! but it's about how bitcoin will be Knowed from almost of people ! the problem that bitcoin have many obstacle ,and most of people who use bitcoin now are younger , the oldest people don't know what means bitcoin or what is it or how they use it !
I think bitcoin will spread naturally. either by word of mouth, or they find bitcoin on the television, or the media or the internet. bitcoin fact continues to spread but I agree that it is impossible bitcoin will have everyone user in 2022
The main stream media have reported the rise of bitcoin quite a lot now. That will make people aware of the coin.