This depends on a lot of factors that change rapidly and are hard to predict. Essentially it will take until 2130 to mine all Bitcoins, regardless of how much e

This depends on a lot of factors that change rapidly and are hard to predict. Essentially it will take until 2130 to mine all Bitcoins, regardless of how much electricity/computational power is thrown at it (there are some technical exceptions to this, but they are unlikely). Current mining is probably using on the order of ~30-50 MW. At 10 cents kw/h (low estimate), that's ~$100k/day. It also grows with the price of Bitcoin, so it has been growing rapidly recently.