If not everyone used bitcoins in 2022 probably it will increase the number using bitcoins in 2022.
I doubt that everyone will be using bitcoin on year 2022. The awareness will spread throughout the world but thinking that all of us will be using it at the same time is not going to happen. 5 years from now, is not enough to make everyone use bitcoin by that year.
Bitcoin will not be used by almost everyone because if bitcoin will be used by almost any people around the world then bitcoin will lack of its supply and have a shortage and that is why bitcoin is not designed for everyone. I think bitcoin will just be accepted by the shop owners and not everyone because that is very impossible.
Don't think that the supply will lack for all the potential users of bitcoin. Because if we are going to become many, the demand will be higher and that's the start of bitcoin's price to increase. Just like what is happening now, even there is a limitation for the supply still many are going to get into it because there is so called mBTC or satoshi's.
Widespread bitcoin usage will definitely cause some issues with the scale of the units. there aren't enough bitcoins in the world for 7billion people to use. I think when bitcoin gets to that stage, there will be a requirement for something that is even smaller than mBTC.