One property of money that divides classical economists & Bitcoin enthusiasts is the significance of the deflationary spiral.
While Keynesians argue that a currency needs to be managed to sustain economic activity, Bitcoin enthusiasts lack a strong response.
I wondered about this for a bit and wrote a blog post just now. Any feedback would be appreciated.
http://jaekwon.wordpress.com/2013/12/02/the-supernova-theory-of-deflationary-currency/