Which consumes more power: Banks or Bitcoins? (2018)

[hyperluz]

https://medium.com/@zodhyatech/which-consumes-more-power-banks-or-bitcoins-8302750fe2bc

[danuker]

Per transaction served, there is no question Bitcoin uses more energy. That is because it uses cost as a defense mechanism.

The node sacrificing the most computing power is the one least likely to spam.

That said, perhaps it's too much reward for this sacrifice; the transaction fees are quite expensive.