For those of you who own blue-chip stocks, this is an eye-opening prediction. An article at CNBC.com talks about the possibility of Dow 10,000. Dow 10,000!

I repeated that in case you didn't get it the first time. It sounds pretty scary to me, and it should sound pretty scary to a lot of you out there. I'd have to presume that most investors don't use the stock market primarily as a substitute casino for the times when Las Vegas is out of reach. Many of you out there must own a Disney (NYSE: DIS) or a Coca-Cola (NYSE: KO), maybe a General Electric (NYSE: GE) or a Microsoft (NASDAQ: MSFT), something generally considered core and safe for the long-term. I happen to own the first three. Anyone who does is in for some huge volatility if Dow 10,000 comes along.

Actually, whether it comes along or not, volatility is here to stay. And here's the thing about the Dow 10,000 prediction: it isn't so farfetched on a mathematical basis. When you first read that number, you say to yourself "No way, that would be like a depression!" But because the numbers are getting higher, the actual point moves aren't as dramatic as they may seem on the surface. If we hit 10,000, that would represent a decline of approximately 29% from the high reached back in October 2007. As I write this, the Dow is about 20% off the high. Is another 9% feasible?