He hasn't answered why he just doesn't get his backers to buy from Mt Gox

So, he doesn't really have $$$ backers but rather wants to represent a pool of old money bitcoiners to the money bags of wall street to start something.

As I said earlier, the way to do this would be to ask maybe ~10% of holdings from old money types and then get some momentum and perhaps others would add to it.   The reason being, someone with 5000 btc can't really realize their gain anyway since that amount is pretty impossible to actually cash out of an exchange.. sure you can sell 5000 on an exchange but are they about to drain all that cash out of their liquidity to your bank account?  Maybe once.. not 20 times for sure

But the other question will be a hard answer.  What sets the price of bitcoin anyway?  A bot run on mt gox that other bots react to? Coinbase is a headless chicken during fast pumps and crashes triggering very wide spreads trying to save its ass from being exploited. 

The irony is that easier access to cash out would kill the price at least in the short term but then it could get more widespread after that and then the value trend back up.

Or, if things progress as it is now and the current exchanges can survive as is (can coinbase survive in this chaotic climate?), the price can stay pretty high and slowly bitcoins can spread out to the masses.