Too many inaccuracies in this article to be believable.
Yes, POW is a problem but reading this article I doubt the author ever designed mining hardware, description of sha256 is wrong for one, whole thing smells.
Actually I am betting against bitcoin as I only hold alts, and I only hold small amounts of POW coins because I believe the concept is not sustainable and the fixed block solve time brings certain kinds of scalability issues.
I like the look of Universa currently to try and address a lot of the POW issues and also the hard fork and Kitties type problems from full decentralisation.