Have you heard of Central African Republic and El Salvador?
These are the two infamous countries that however have adopted bitcoin as a legal tender for use in their country. El Salvador even went as far as building a school curriculum that includes bitcoin in the learning for schools. Some other countries are yet to adopt bitcoin officially but that doesn't mean companies, financial institutions and stores within these countries ain't accepting bitcoin, it's just a little restrictions and regulatory policies here and there but with time the adoption will increase anyway.   https://news.bitcoin.com/.