Bitcoin has a good response in many country. Bitcoin will help those country to overcome their financial crisis and also help to built a strong economic in those countries. In central Africa country like Kenya, Zimbabwe etc taking the benefits from bitcoin through Bitpesa

. This app help them in their transaction and in many other thing also. Bitcoin mainly reduce the unemployment issue in those country by providing job in their country people.Bitcoin also provide its mining help in those country to create their own Bitcoin. With the help of Bitcoin they can buy anything from Internet. Even those thing which are not sold in their country

In short, Bitcoin is typically a factor of economic growth in some countries. But do you think bitcoin can be consider to be classified as a underground economy income source? Maybe it depends but if we are to consider things, in developing countries, maybe bitcoin is legal and also has been taxed. So if individuals, earn money through bitcoin then they will pay taxes with percentage. But here in the Philippines, it is not. That is why, increase in purchasing power is increase because people get some income from crypto.
Yes bitcoin is legal in developing countries and that's why they want to pay in bitcoin everywhere because bitcoin is secure currency and very soon it will more improve by their government and i think other countries will also accept this currency because it is also very beneficial currency for economy of a country.