You're correct in the financial sense, but not socially. I can't entirely opt out of crypto because people around me are making or losing (mostly losing) money

You're correct in the financial sense, but not socially. I can't entirely opt out of crypto because people around me are making or losing (mostly losing) money it. Mining also pollutes air that I breathe and accelerates climate change. Regardless of whether you think these external effects are worthwhile, they exist and are unavoidable.