Nor should we have ever seen gains like that in the first place. The market was so overinflated because of margin trading, as was posted above, that it had nowhere to go but bust.
While I would never call myself a financial guru, I am an investment banker on Wall St and I'll give my 2 cents.
Whatever your timeline, keep putting money in your 401k. What is your other choice? Cash? Your contributions to your 401k aren't taxed until distribution, a huge advantage. If you decide to forgo your 401k, you will in essence be double taxed. Taxed on your distribution up front and taxed on all gains in the back end. With the 401k you're taxed only at the back end -- and you make your true money by using the leverage.
The market is bad right now, obviously. Is there room to drop? Absolutely. Let's take Ariba, just as an example, not picking on anyone. Ariba was trading at 150 and more, and is now under 5. But at 5, it is still trading at almost 4 TIMES REVENUE!!! That is insane!! We're not talking 4 times earnings, 4 times revenue!
There are so many companies that are still overpriced. The tech craze is the reason for it. I knew things were going to hit the fan when I was renting a movie at Blockbuster and heard the clerks discussing whether or not Cisco could go up from 60. People were playing the market without having a SINGLE clue what they were doing. Daytraders, housewives, everyone had an Etrade account. Inktomi was at 188 and is now at 2. There are a billion examples. And you know what? 2 is still too high for Inktomi.
So what should you do with your money? Well, I would highly suggest you don't invest it yourself. There are great bargains out there, but this is truly a stock pickers market. 99.999999% of the world does not have the time, talent nor intelligence to figure out what to buy. Stick your money in a mutual fund, preferably a mid-cap fund and a defensive fund. Oil, gas, tobacco -- though none of them are sexy, are completely effective.
The problem is, after last year, everyone wants to buy at 3 and watch it go to 50. IT'S NOT GOING TO HAPPEN. Buy at 18 and be THRILLED when it hits 22! That's true growth.
The market is reaching for a bottom. Is it there? No, but you'll never find the bottom. Buy near the bottom and you'll never lose money. Right now there is about 5% downside and 50% upside. The thing to watch is book-to-bill and inventory amounts for these corporations. Earnings are still going to be shitty because they are trailing, the are just telling of the past.
To make a very long message simple:
1) NEVER spend on margin
2) NEVER buy a penny stock
3) don't expect 50% growth
4) don't check the ticker everyday to see where you are, you'll go nuts.
5) trust your money to a professional and don't worry about it. Everyone here should be in it for the long-run. Take a macro view of your investment and study the baseball lines instead.