Last I checked, it takes somewhere around 700-2000 kilowatt-hours to settle a bitcoin transaction. This is a lot of energy. Instead of doing that, you could ha

Last I checked, it takes somewhere around 700-2000 kilowatt-hours to settle a bitcoin transaction. This is a lot of energy. Instead of doing that, you could have ran a top-spec IBM Z-series mainframe for at least a day (30kW consumption). Imagine how many credit card transactions you could process in 24 hours on such a machine. (hint: it's all of them) BTC is like 7-8 orders of magnitude worse than big finance when it comes to energy/carbon footprint.