still 2022 has got 5 years left but i dont think you will get not more then 50% of the users of world population. Ya if their is any legal move of making bitcoin legalize in almost top country then we can see the sudden raise of users of bitcoin. Till then dont expect before 2030
At present very few were aware of bitcoin and other digital currency. In term of count almost 25% of the entire locality starts using bitcoin. Government have got regulations which is not 100% effective.