A constant theme that comes across from experienced miners is that the previous generation rigs have better returns than new generation rigs. Anyone that has purchased a reliable used car has had this similar experience - the used car gets you around as well as a new car but your basis is significantly lower. Using September 2021 data from Hashrateindex, we looked at the topline returns on a per rig basis for a Bitmain Antminer S9 released in 2017 versus a model S19. Besides

Given recent press reports on energy usage by the Bitcoin network, it is helpful to use the S19 miner specifications to measure the total network energy consumption. The entire Bitcoin Network could use around 35.5 TeraWatt Hours. That is less the amount out energy, in the form of fuel, wasted be vehicle idling (in traffic and at lights). According to the US Government, in the 2020, 1.7 billion gallons of fuel were wasted idling. With an energy content of gasoline (33.41 kWh/