Quote from PoundTheRock:
I'm gonna vomit if I see another one of these threads.
Why do these threads keep emerging? The question was answered succinctly and well. Get over it.
I'm not going to knock Mother Theresa or anyone else that didn't just sit on their ass and complain that someone else didn't contribute enough.
These conversations continue, but the question of value has been answered. "Liquidity" is the word. It keeps the whole grand thing running.
What's with the "honest living" crap? Trading is the most honest living there is. It's "honest," because it's pure. Scalpers, arbs, position traders - everybody volunteers for their side of the trade with a full knowledge of the facts (or at least the ability to acquire that knowledge). You don't sell with puffery if you're a trader (unless you're also in a retail business or on CNBC). You just let the volunteers that are already asking have what they want.
"What you do with the profits" isn't what makes your living important or honest. That thinking is a trap. Robin Hood wasn't an "honest thief," because he gave the money away. If there is any argument for Robin Hood's honesty then it is in who he was stealing from and how they obtained the profits. If you think about his society and the fact that the king's wealth was obtained through oppressive taxation then he was very much like Ragnar Danneskjold. (That's just a sidebar for my Objectivism 101 amigos though.) The point here is that trading supplies the need for liquidity and there is a real constant demand that you don't even have to work to create (as in sales).
If you think that traders don't really contribute something then you can keep on trading, but profits will always be hard for you. You'll either lose sleep or give it back, because you wonder if it's OK to be up $100K. You'll probably experience some horrible combination of losing money and sleep.
Get over this - and get over it fast. It will kill you in any potentially profitable endeavor.