I agree with practically everything you said.  Really.  

I just want to consider everything.  Although I am convinced that inflation is usually very bad for practically everybody (except for *cough*, you know who), I am not convinced that rapid deflation will provide the simple after affect of increased purchasing power.  It can't be that simple.

Looking at the history of gold and silver - there have been plenty of instances (historically speaking) where the volatility in those assets would be unbearable for a conservative investor.  History has shown us that a few entities have the power to play ping pong with those assets.  Manipulation is very prevalent in these markets.  What makes you think bitcoin is immune to this?

In the end, I am very interested in bitcoin's future.  If bitcoin proves to be successful in the long term, I will be the first to defend the statement that the "deflationary spiral" is just a myth.