I’ve identified three credible estimates of Bitcoin electricity use that agree with each otherwell—Bevand, Vranken, and Krause and Tolaymat—and three others that have seriousissues—O’Dwyer and Malone, Digiconomist, and Mora et al. The latest estimate from one ofthese credible sources is about 5 GW of power use globally on June 30, 2018, with someindications that electricity use started falling around that time, due to the collapse of Bitcoinprices in early 2018. If converted to annual electricity consumption, 5 GW represents 44 billionkWh (44 TWh), or about 0.2% of global electricity use.
https://coincenter.org/files/estimating-bitcoin-electricity-use.pdf ^
-just another 50.8% needed to be safe