We can not deny the big country with good economy, it will make the society economy better too.
So they can follow the economic development and participate in transactions and investments in Bitcoin era.
How the people of small countries can participate in participation and benefit from it?
It would be very difficult to calculate the statistics of users of each country, but the comparison of Bitcoin ATM growth from this early 2017 report can be the initial reference of the statistics.
Perhaps by the end of this year, there will be more Bitcoin ATM growth across the board due to the growing interest in bitcoin this year.

Related to the topic, i guess the people in from the developed countries don't have the same problems like corruption, food, clean water and so on. Perhaps Bitcoin is the chance for all of us to be more developed, intelligent and civilised.