Let's say some of you hope for mass adoption (do you ?)
The CO2 emissions would be way out of hand.
Gov have to make a new treaty to forbid bitcoin mining, or to allow only green energy mining.
Forget home mining since you would have to have your own solar plant.
I want to mention though that some of you in the forum have already invested in solar plant for their bitcoin miner. I would advise them to use that electricity for better use than to enable criminal transaction to occur under the radar.
