because bitcoin was created with the times and technology and that's what makes people invest in crypto currencies that are in advanced and modern countries
and also now that the investment in many countries has grown a lot which makes them get freedom
But what kind of technology we need to invest on the bitcoin?
An android or a pc with internet connection will be enough for people to buy and sell cryptos.
So the analysis based on number of ATM is not going to be right.
Lets be real, US is one of advanced countries, people there have really high paychecks, monthly paychecks. I work entire year for almost nothing with what money will I buy some bitcoins and how much, but average american can take $100 and buy bitcoins, in my case its half of monthly salary, can we compare that.
In my town people still dont know how to use credit cards, what to say more, they dont know to use cash atm, about bitcoin atm they never heard. And this is story how to get some bitcoins, where to spend them is again similar story, in advanced countries you have where to spend bitcoins, in my town you dont have a single place to even talk about it.