Not almost everyone but merely 98% is using bitcoin on that year.because in this era we are living technology is rising,and by the help of this bitcoin will be more popular in every year that will past.
I doubt it, 98% was too big, and I don't think that it is possible, remember that not all of us has the same age, there are generations older than us that are still alive and have no idea on how to use computer and those people that live in remote areas where technology always comes late, and most probably their percentage in the total population of the earth is much more than 2%...
