Great question and a fun game. Going from the notion that he's said recently, repeatedly, that he thinks this is a "double digit stock", I'd say the floor would be $5 billion. That assumes 500mm shares outstanding including warrants, etc. I think he listens if someone walks in the door and offers that today, even though I firmly believe that $5 billion is a laughably low fair value if all indications advance as expected.
Other thoughts from my company in the peanut gallery?