There already are many cryptocurrencies that dont use proof of work. Its first generation, obsolete tech. Cardano, for example, is 1000 times more energy effic

There already are many cryptocurrencies that dont use proof of work. Its first generation, obsolete tech. Cardano, for example, is 1000 times more energy efficient than Bitcoin https://adan.eu/en/article/blockchain-protocol-energy-footprint https://adan.eu/en/article/blockchain-protocol-energy-footpr... And the idea that proof of work can be ok because its done with renewable energy is stupid to me. That renewable energy could be powering something far more useful.