Great article that clears up misconceptions. Indeed, Bitcoin is a step forward from our petro-capital based currencies. And Ethereum another step. And Cardano. However, it is essential to raise our standard of "green"! And to be clear: all these blockchains are fundamentally net-additive. In other words, the net-impact of their chain operations, based as it is on computer powered calculations or networking, adds carbon to the atmosphere. This is not how the Earth greened the planet. Earth processes are fundamentally carbon net-subtractive. Following the Earth's example is the way forward. THIS is what we need as a the foundation for our currencies. It also happens to be what my team and I have built: www.ecobricks.org/brikchain