Here's how much energy it really takes to mine Bitcoin and why people are concerned - CNET

Cryptocurrency takes a lot of power to keep things running.

“ one Bitcoin transaction takes 1,544 kWh to complete, or the equivalent of approximately 53 days of power for the average US household.

To put that into money terms, the average cost per kWh in the US is 13 cents. That means a Bitcoin transaction would generate more than $200 in energy bills…