Earlier quoted context omitted.
I'm skeptical of proof-of-stake, proof-of-work seems like the main innovation of cryptocurrencies that differentiates them from the standard financial industry? If you swap out POW for POS (or worse clearing house type trust orgs like Stellar) then aren't you just putting trust into some incentive based system no different than existing financial systems? Just instead a government you're trusting some other entity. Y…
And this is exactly why I'm so skeptical of cryptocurrencies in general. There doesn't appear any viable way to make them work as currencies that doesn't either have horrendous externalities, simply replicate what existing currencies already do (often poorly and with many downsides), or often both. I don't think it's a coincidence that even a decade plus later, the primary use cases for crypto still seem to be grey/b…
The CO2 emission externality need have nothing to do with Bitcoin or any other proof-of-work chain. Tax carbon at whatever level makes sense and Bitcoin will adjust. (As I understand it, even currently Bitcoin mining mainly uses renewable energy, because it's cheaper; and it's trending cheaper still.)
The externality is at the power plant, not the use. Banning a use is like basing your server's security on client-side Javascript.