Even without being told, if you ask me I'm still going to mention those three countries as the people that makes the most use of cryptocurrency, cause those countries are the ones that usually adopt things like this quickly. Though at first I used to think that most people who make use of Bitcoin lives in China and not US, But they mentioned that USA has up to 30% of Bitcoin users while China has 15%. I'm guessing it was caused by the Chinese government banning cryptocurrency, so that would have caused a lot of people to stop making use of it, and that's if there is even anyone making use of it there.