And peoples are using it as payment instrument too, mainly from underground world i guess.
So, no matter how bitcoin used anywhere, it is good to hear that many peoples still using bitcoin and cryptocurrency.
your guesses here have no value specially since you are making random wrong guesses. it is obvious that one of the biggest usages of bitcoin because of its volatility is for trading and investment but that doesn't mean the usage of bitcoin as a currency is small or limited to illegal activities.
in fact Africans are using bitcoin as a means of payment more than anybody else in any other country. there are people who have been mining bitcoin and using it to buy food and have it delivered to their country for over a year now.