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.

It does not make much sense actually I think big and developing country have just vast knowledge compared to other country with regards to bitcoin. Or maybe due to the speed of internet in the country it could be a factor too.