Don't go by the numbers. Less than 5% of Indian population have ever heard about cryptocurrency and those living in the smaller cities and rural areas are completely unaware of it. There are less than 10 million users in local cryptocurrency exchanges. If you add the P2P users as well, then the figure may come to 20-25 million. But still there is a good chance that there are more users in Nigeria (at least in terms of number of active users).
Where are you getting your numbers from?
Less than 5%? You make it look like India is a real shithole where people are so ignorant about tech leaps and cryptocurrencies unlike Nigeria but you will be shocked.
I am from India and therefore I have a fair idea about the situation here. There is a lot of hype among the youth regarding cryptocurrency in the urban areas, but those in their 50s and 60s still regard Bitcoin as some sort of a Ponzi. And the knowledge about cryptocurrency in most of the rural areas (perhaps with the exception of South India) is very low. But the real issue is with the government approach to Bitcoin. Some of the bureaucrats and government officials still would like to treat cryptocurrency users on par with criminals. They can't digest the fact that cryptocurrency can give financial freedom to ordinary people. That will reduce their power.