Earlier quoted context omitted.
Mind saying more or linking? I keep hearing strong opinions against bitcoin but haven't heard details.
The most clear-cut argument against Bitcoin is that it is a ridiculous waste of energy. The nature of mining in the protocol implies that if Bitcoin takes off on any significant scale, there is a dichotomy going on: either there are so few miners that single large actors can dominate the total hashing power of the network, making it vulnerable; or, a significant fraction of the total world computing power goes toward…
This things solve the computational work at a couple orders of magnitude greater than GPUs (the currently prevalent mining hardware) does.
So instead of 70% of the cost of mining going to pay for the electricity, it will be 10%, and the cost of the technology consuming the remaining 90%. I.e., in terms of total kWhs consumed for Bitcoin mining, we probably are already past the peak.
One single bank building in Manhattan consumes way more power than Bitcoin ever has.