2) Obviously I looked at the BTC piece here.
It's 'efficiency' is 79--meaning 1 BTC is worth about 79x how much it would cost to offset the carbon from being mined.
All BTC existing have ~363.
(Roughly in line with our calcs.)
How does this compare to other activities?
3) It's sort of middle of the road.
The climate impact relative to value is smaller than:
--Netflix, showers, AC, cheeseburgers, planes, ...
On other hand, it's *worse* than:
--Buses, Amazon, skyscrapers, Google, fighter jets, ...
