Earlier quoted context omitted.
Shrug... did some quick Googling and found this: https://twitter.com/elonmusk/status/1392938133163888640 He might be right.
So reviving old power plants was the final straw for Musk? If that hadn't happened, he'd continue to support Bitcoin even with this incredible energy usage? I don't know. It seems very convenient to list them as reasons now.
Could also be some other person, like his wife or kids who pushed him to do this. Or other members of Tesla management worrying about the brand damage.