When i pick up a loaf of bread its 0.012, and when i check out its 0.012. Currentsies are going to shift against each other. The exact same thing would occur if you walked into a store in, say, Germany and handed them dollars. Also, do you mind telling me how much energy the banking system uses to run their equipment, build their buildings, have their employees come to their branches, move armored trucks full of cash, etc. Like, I can understand the power use thing being an issue. But if you want to go after something that would make more of a difference, how about figuring out thermal bricks or something for industries making glass? Which produces a hell of a lot more greenhouse gases than crypto mining does. Industrial processes are a huge polluter. Or how about the global transportation system?