While it is true that it is difficult to remove fiat from some exchanges, this does not mean that people are not willing to pony up fiat for bitcoin purchases. A bitcoin purchased from MT Gox for $200 still cost someone $200.
Anyway, my comment is: $200 is the new $100.
If $200 is the new $100 then $300 is the new $200 and I am ready for some tri-bit love!