If you're in rural India and don't have access to a bank account, but you do have internet access via a smartphone, then I could definitely see cryptocurrency being valuable to you. And that doesn't even take into account countries like Venezuela that are experiencing hyperinflation, where cryptocurrency would be much more useful. There are cryptocurrencies that are energy efficient and have low (or even zero) transa…
How exactly do you imagine that an unbanked person living in rural India would be able use cryptocurrency? It isn't like they can just enter their credit card into a website and buy some. Not to mention that even if they someone managed to acquire some, the $5+/transaction fees are going to make something like bitcoin or ethereum completely impractical.
you're talking as if bitcoin and ethereum is all of cryptocurrency.