As it stands right now, Bitcoin's energy use isn't particularly problematic. But that's because Bitcoin is really small. The worry isn't so much that Bitcoin is

As it stands right now, Bitcoin's energy use isn't particularly problematic. But that's because Bitcoin is really small. The worry isn't so much that Bitcoin is destroying the planet now, but that if it grows to match the scale of a "real" currency (as its proponents keep saying it will!), its energy usage will become dangerously large.