Worry because you may have to find another job sooner than you’d like.

Between client-side and agencies, switching jobs in the internet biz is common. However, I am running into more and more people I know who have new cards from funded startups.

Heck, in my last job I did it, again -- and imploded -- again. It's in our blood. It's attitudinal, and unfortunately it's a disease many of us cannot be cured of. But it also signals the euphoric optimism we had learned to be so wary of. We are much more accustomed to risk. We don’t expect a pension. Hell, we don’t even expect Social Security to be around when it’s our time to collect.

People just coming out of college and being lured to startups are unaware that there is a 90 percent chance that their company will crumble in less than 12 months, but they believe in success nonetheless. I am meeting more people describing their web 2.0 company, and I cannot figure out how they are going to make money. It's the "miracle" plan we’ve all seen before. They just get the "influencers" and then look at the product adoption curve. Wow, we’ll all be rich.

Not likely. But it’s possible. Investors invest in many companies. They know that they will not all survive, but the upside of the portfolio of companies that they do invest in is usually positive. Only one or two of them have to survive for the investors to make money.

The employees of those companies buying into that dream, however, will have the same rude awakening and emotional letdown as those who have gone before them. They will all learn from it and carry those learnings over to their new businesses. It’s a cycle of birth and rebirth that increases our overall knowledge and makes this business more stable over time-- the same way it did with radio, television, telecommunications and the auto industries that have had the same cycles.

Just realize that you may get a little weary of being born again in the process.