Not if you look at the stock market holistically. There's multiple brokers and exchanges, hedge funds using supercomputers to try and get a tiny advantage over the competition. Plus, how many hundreds of thousands of people work to keep the stock market functioning and meeting regulatory requirements? And how about the cost to build and maintain the physical buildings like bank headquarters and thousands of bank branches? It's more than just electricity, it's land and raw materials that could be used for an activity that produces something. I don't really care what traditional banks do, but my point is that if government makes crypto illegal because it consumes "too much power", they'll start shutting down other things they don't agree with also. The democrats have already tried the angle that gun manufacturing is harmful to the environment.