No. This is too short a period of time. Even now, many have not heard about bitcoin or can not use it because of the lack of a stable Internet.
I agree with you,some isolated areas dont even know what is facebook due to no internet on thier area, so its so hard for them to understand what bitcoin is. They dont even know what it is.
well op didn't actually say that it would exclusively be bitcoin by 2022. and though I agree that there are still a lot of places who doesn't have access to the internet, those who have may have already come across or have used btc one way or another in 5 years. it's not impossible if you think about it