[opinologo]

You know what else consumes heaps of electricty? Your computer, your data centre, your AWS account the bank services you consume, your appliances and a large etcetera.

Bitcoin is the first financial break-through in a long, long time. Is designed to move control away from the few back into the hands of the people. In Argentina people love investing in Bitcoin because their currency is awful. It loses value because the government can print more. Just like in the US. No government can print more Bitcoin so the value keeps growing.

Bitcoin alternatives like Bitcoin cash (or regular Bitcoin but with a bigger block size) can be used across the border without censorship. Remember MasterCard banning donations to Wikileaks? Bitcoin cannot be banned.

Back to your comment. Now we have solar, we have wind power. All clean sources of energy. They are cheaper than coal and can power everything. Including Bitcoin.