AFAIK, Pakistan and Bangladesh banned Bitcoin, India imposed 30% tax rates and Sri Lanka doesn't have any regulations yet on cryptocurrencies.

But these all are countries where poverty exists?

Nope, we just assume that these countries are really being poor and that is what the media shows us too particularly about India but look at what they have been doing, and its one of the fastest growing economy in the world and will be the second larger economy if they goes in the same rate in less than a decade.