This week I address the age-old criticism of bitcoin and its energy usage. Is Bitcoin a worthwhile endeavour for us to be spending our electricity on, and why is it a bad idea if we switch bitcoin to another consensus method such as Proof of Stake which uses less energy? Does the pathway to a sustainable future even require that we use less energy? Since demonstrably, humans use more energy even on a per capita basis, compared to humans 1000 years ago. I answer all these questions and provide my viewpoint.