Imagine the damage to any economy that adopted bitcoin as its currency, it would be hugely squeezed.
Like the unbanked individuals which have no safe way of storing their wealth or the people whose national currencies are so hyperinflated that they had to turn to a digital one for refuge?
Local economies matter as well - after all, the culmination of the various businesses result in the aggregate economy most people refer to when they talk about "the economy".
For a thought experiment, replace the term 'bitcoin' in the quote with all sorts of other words and see how your opinions change.