Yes, even im not sure about this. Its Keynesian and lets be honest, most of us are tilting towards the Neoclassical/Austrian school of thought
The issue remains that Bitcoin can't be a "medium of exchange" or "unit of account" until price volatility stops.
If we justify hoarding as "the smartest thing to do" -- then we have bigger problems. Lets agree that its the ONLY thing to do instead of pretend this is a strategy that clever people are employing.
The issue will arise - the world has never worked with a non-inflationary currency before. Hoarding will affect circulation - the question is how will this be dealt with and is it the responsibility of the currency or the people.