The Author of the gibberish Robert A. Manning has his agenda.

In this case his remit is to trash cryptocurrencies in any old way with zero original thought.

His agenda in this instance - climate change - because he read (a load of crap) somewhere, without doing any of his own research on the subject.

If you care you can read up his well documented bio. Now a has been writing articles for a few hundred bucks for downmarket publications.