This is something I don't agree very much. Of course someone can be able to produce BTC or other crypto with green energy but the main problem is just that it is a way too energy guzzling, no matter it is a green energy. This will limit the future possibilities and the future of cryptos will be the one that is really green in the sense of "few eneergy guzzling".

I'm still looking for the crypto that will fill those criterias and this will be the future currency, trust me !