Having an opinion is fine.

The problem with gurus and their guesses is not that they’re always wrong. Part of what makes these forecasts so tempting is that the gurus are right just often enough for us to believe that there’s merit in listening. Unfortunately, it’s incredibly difficult to identify which forecast will be right. So what does a real person do with this information? I suggest you use it as kindling, as a starting point. I know it’s fun to chat with friends or colleagues about your opinion of the stock market. I also know it can feel like the duty of any self-respecting American to have an opinion about the market and the economy. Having an opinion is fine. But acting on it with real money is often incredibly damaging.You need to realize that no one can tell you with any sense of precision where the stock market (or any market) is going. If you’ve learned nothing else during the last 10 years, I hope you remember that the stock market won’t perform in a set way indefinitely. At some point the market will go down, and it may be for a long period of time.

Just as likely, the market will often go up a lot over a long period. So for the real investors who are investing real money in the real world, take note that you should build your investment strategy around your life and your goals and not the annual guesses of gurus