Still quite sure that a global-scale monetary system based on a PoW #blockchain would be worth the energy cost. I’ve held on to hope for quite some time, but as of now, #Bitcoin hasn’t reached that goal, nor is it close to doing so. I’m ready to declare that experiment a failure.

I'd dare to say that there's no real world practical consensus algorithm available as of now. PoW and PoS variants all come with their own share of problems. And any too powerful party can own the system. Then I rather trust in our national bank and the legal system.