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I think BTC energy consumption is a major issue, as is speed and capacity. I'm actually not sure what real problem BTC is actually solving currently!

Also, I don't quite understand your first question. Care to elaborate?

If you’re not sure what real problem bitcoin is solving then you are living in a bubble.

30% of the world unbanked. Bitcoin provides a way for them to store their money.

If they're unbanked, how do they buy bitcoin? You can't just hand over notes for bitcoin in that many places, can you?