I'm definitely going with the 3rd world countries,even though they are kinda reluctant to invest in the bitcoin,they have been actively investing in cryptocurrencies in the last few years..
And considering the level/cost of living over there,one can make a living off a little investment from crypto/bitcoin as opposed to some developed countries...
Regardless of the country category, any country can earn on bitcoin.The crypto world is open to everyone.Personally, I noticed this trend-in the countries of the 3rd world, cryptocurrency mining is more developed.in developed countries, investment and investors predominate, and in developing countries, new technologies are beginning to be introduced and new platforms.This is not a categorical answer but rather a personal observation.