I stopped reading when the author blamed US currency on the recent global financial crisis.
The same things happened when the world used gold and silver.
Not surprising: Keynesian economist doesn't like Austrian economics explanations.
Surprising: Bitcoin part is largely left uncriticized.
I would say the author of this article is clearly biased against the Austrian view that make Bitcoin attractive to the libertarian types so the criticism is largely unsurprising.
What we do see is that the author of the critique and the author of the book can't be both right, especially about history. The success of Bitcoin does seem to favor the Austrian interpretation, though I'm sure many will disagree. Whatever the case, the experiment that is Bitcoin will continue and give us more data to make the case ourselves.