Quote Originally Posted by jk View Post
as of nov, 2018:

estimate - bitcoin mining accounts for about 1 percent of the world's energy consumption.

As of 2018, the computers on the bitcoin network were doing 342,934,450 gigahashes per second.
Mining companies that run lots of ASIC miners as businesses claim they use one watt of power for every gigahash per second of computing performed when mining for bitcoins.

At this rate, the bitcoin network runs at 342,934,450 watts—roughly 343 megawatts. Calculations based on EIA data reveal that the average U.S. household consumes about 1.2 kilowatts of power, meaning that 343 megawatts would be enough to power 285,833 U.S. homes.
The initial bulk of bitcoins created by the early birds didn't require such a large amount of energy to mine, as is the case for most other crypto. The subsequent effort to mine for bitcoin is only a cover. Without this effort to slow down the creation of bitcoins, governments would have felt threatened by it and all would have banned bitcoin. Now with corporations like Facebook getting onto the crypto bonanza, others like Apple, Amazon and Google and a thousand other corporations will follow and you can be sure that central banks will have no choice but to come out with regulations and these will apply to all cryptos.