People always underestimate how valuable information is. When you short a stock or a currency, you are not "screwing" someone, but providing information to othe

People always underestimate how valuable information is. When you short a stock or a currency, you are not "screwing" someone, but providing information to others saying "this thing is screwed". If you believe something is wrong, you should announce that to everybody, loud and clear. In a marketplace this "announcement" is carried out by a big short, because that's the only kind of message people are able to hear. And borrowing from your example, if there is a big group of drunk men marching to an abyss and no one would listen to a word you say ( well they are drunk), then maybe the moral thing to do is punch them in the face and run the other way.