I think crypto will be far more sustainable than fiat... If we account the carbon foot print of physical banks in every town and physical transport of money that goes to and from these banks not to mention the actual minting process....
As for Bitcoin yes its mining is rather wasteful however I believe crypto will eventually change into a tech driven market and not a media/special interest market...... That being said many other cryptos do it better than btc for the future carbon foot print of crypto is 1% of what fiats carbon fooot print is..
@obiwa I agree entirely. In fact, I have a hard time taking all this talk of Bitcoin mining and global warming as anything other than a half-assed attempt on the part of central bankers to keep people hitched up to their fiat currency gravy train!