I think its down to many factors really.  Some of the major factors for people in developing countries are intermittent power supply and internet service which makes it very difficult to either get online or stay online with either of those services not being available steadily.  Also, i think those of us from certain continents have much more disposable incomes that we can afford to invest in crypto without much risks to our daily living standards whereas for some countries, every little amount can make the difference and can sometimes be about survival..