While such countries as Venezuela, Kenya, Nigeria, Vietnam are increasing this direction. This is due to the devaluation of local currencies. Also, many countries restrict the withdrawal of currency from the country. Cryptocurrencies are a good solution to these problems.
I don't know for other but I can vouch for my country, the local currency Naira is typically worthless, a million Naira was around $2,500 few months back when a dollar was trading around 400Naira per dollar but currently you'll barely get $2000 which means holding naira is a waste of time. Everyone in the country is trying to secure their funds in dollars and the easiest easy to do that is involving themselves in the industry.
With just a wallet and internet connection, you can get your naira converted to dollars if you're involved in cryptocurency but if that was to be done with the banks, you'll have to go through different procedure that it can becoming discouraging.
Crypto adoption will continue to increase in Nigeria as the masses has seen it as the saviour to the devaluation happening to Naira. I hardly have any Naira in my account, all my funds are stored in crypto and only get exchange to naira when the need for spending araise because spending directly with crypto isn't yet common in the country. I'm pretty sure others are doing the same too.