I don't think that 93% of all investors lose money, including day traders. Many people lose money trading pork bellies and other C.C's. I know several people who opened a private account to buy SIRI at over 6 bucks, thinking that they would get rich, as those whom had bought Mircosoft back in the 80's. Many of these SIRI types lose money who open an unmanaged account with little experience, lose on a few trades and then give up. Learn as much as you can before investing and play on paper first.
I've "lost" a bit of money in the market, but you know, I've learned from my mistakes, and I refer to that money as tuition that I had to pay to stay in the game.
People get chased out of the market when they lose money, thinking it's a losing game. In fact, it's not a game at all. If you discipline yourself, study your past trades, and educate yourself, you can improve.
Even the best traders take a bullet once in awhile, though. It's not for the faint of heart out there :).