Bitcoin still not so popular but in the future we will see more users will come in bitcoin..
No i dont think so. Your statistics is quite too low i think that would only apply maybe in uk or china?. I believe that we are currently in 15-25% right now. Well i am not saying that i am right
The world population is more than 7 billion, not sure how you come up with 2 billion. If we at some point manage to reach 1% of the world population, which is +70 million, then we have done an amazing job.
70 million Bitcoin users would indeed be a big step.
Right now I think we are still fighting to have 1million users on an average after 7,5 years of BTC existence.
So a lot of patience seems to be needed.Bitcoin is still to techy and geeky.