In my opinion, a lot of bitcoin users are in poor countries. In countries with low economic and social security, people are more likely to pay attention to alternative income.
Not really, it is obvious that people from countries where the income is greater have more money to spare in something as volatile and unpredictable as bitcoin, however people in countries with bad economies where the currency is very weak have a real use case to hold bitcoin instead of their fiat, after all even if the dollar is inflating it is not crashing like other currencies.