If all the waste heat was using for heating, then you might have a point. If you have to start burning extra electricity (fans, cooling systems) to keep your GP

If all the waste heat was using for heating, then you might have a point. If you have to start burning extra electricity (fans, cooling systems) to keep your GPU or ASIC cool, your argument falls apart. I also don't think people are using mining farms with 1000s of units as a heat source for human habitation. This is the same old straw man, you can make the same argument for Twitter or Hatebook. For all their ills, there is some human benefit from us using them collectively. Crypto is unusable and always will be. Everyone in it is on the pump & dump train. It is all speculation and chasing dumb money.