I love how the subtitle flatly contradicts the actual title. What happened there? Did some editor feel the need to damp the article's criticism but lack the resolve to go farther than the title?
No, there's a distinction between cryptocurrency and the underlying blockchain technology. There are a number of applications of blockchain that are promising such as in settling financial contracts that don't require issuing a speculative token to go along with it.
I see, I didn't read closely enough. Oops.
I don't think they contradict each other—the article also talks about non-currency uses of blockchains.