I'm not sure a cryptocurrency that has lost ~95% of its value in the past couple years is a good counterexample to this article.
Most people interested in cryptocurrencies have little to no interest in actual use cases. Investors simply want the price to go up. This is usually criticized as a "greater fool" investment strategy.
The article speaks to this. If there is any value in an cryptocurrency, it is up to the developers to divine it. Investors will eventually find a price equilibrium, but for now the ecosystem seems driven by hype, buzzwords, pozi-dapps and bubbles. NANO doesn't have any of that.
When you start looking at cryptocurrencies as code, valuation becomes meaninglessness.