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.
Definitely ,cause investors are attracted to where they will earn .So if bitcoin continously get higher and higher by that time many establishments are accepting bitcoins and more peoples are mostly doing bitcoins.
Telling to your friends or posting ,tweeting about earning on bitcoins is a good thing as promoting bitcoins so many people will get curious about it. As of now i saw many of my friends on fb are using and posting about bitcoins . By 2022 it is nearly possible.
That is right. The bitcoin price will go higher when more people use it. When more people use it, the price will be even higher.