That's depend on the price and its chart, if it will increase highly before 2022 to reach more than 5000$ for example, it will increase a lot of people to start using it. Otherwise its hard that Bitcoin become used by everyone in this date.
Well no one can really predict what is going to happen with bitcoins on that date but I am pretty sure that many are going to be added for the people who uses it.
But there is no certain percentage or number on how many people will start using bitcoins on that time of 2022.
And I think this is going to be possible only if the price is going to attract the users of it.