Agreed.  I was thinking of a general catastrophic flaw in bitcoin, and didn't even consider that a direct cracking of SHA256 would result in all the things that you  mentioned.

Edit: Just to be clear, I  think bitcoin is as close to a sure thing as you can get.  I've made a few large investments in my life based off of macroeconomic analysis, and forecasts that have always been controversial and generally put down and questioned by mainstream financial press/talking heads.  Each of them have worked out (this will be the 4th investment with this level of "sureness"). 

The way bitcoin is constructed, the benefits it provides, the state of its competition, the problems it solves, the magnitude of its genuine practical innovation, etc.  make it a sure thing in my mind.  With the only variable really being time, or some black swan fat-tail event.

Since the supply is known and limited, when it gets anywhere close to main stream, and eventually is main stream the price will be exponentially higher 10k-100k, those sort of levels.