In my opinion it is not possible that by 2022 everyone will use Bitcoin.

If you look at the % of people that have access to internet we are now at about 47%. (https://en.wikipedia.org/wiki/Global_Internet_usage)
Hence first everyone in the world should get connected before Bitcoin can be used by everyone.

If we reach a doubling of the users of Bitcoin every year I guess we will be at about 1 billion users... pretty huge number though.