The problem is: there is not always a way out. Way too many people don't follow the golden rule (don't invest more than you're willing to lose), they took the train 2 months ago ("choo choo!") and now, they're stuck on the wrong side of the train - literally, under the train. Now, those said people are doomed to wait for a rebound, and selling (the way out) would mean a (maybe big) loss, eventually.