13 Jul 2021 Stronghold raises $105m to mine bitcoin with super-dirty coal waste energy at Scrubgrass, Pennsylvania
25 May 2021 Coal-powered Marathon Digital promises greener Bitcoin data center; Elon Musk talks to US miners about renewable usage
FTX collapse: more to do with self-referencing balance sheets than cryptocurrency? 14 Nov 2022 By Torsten Dueing, HANetf