I dont know if third world countries knew about this btc thing
No. Some part of the third world countries doesnt have internet access and even electricity. Bitcoin revolution is a lost cause.
Some of them has nothing to eat. How can you educate them with bitcoin?
Then we dont foccus on the people who is not interested in btc. We cater those who are.
True but sadly those people are IMO the group of people that could be benefited the most from the cryptocurrency technology, as they are suffering from insane inflation and unstable government.