> perhaps not if you're an entrepreneur

It's an essential thing if you want to be a successful entrepreneur -- as long as you don't confuse skepticism with cynicism. Skepticism and optimism make a powerful combination.

Or an investor. It is interesting how often investors goals accidentally line up with early employees.

How so?

Because both end up eventual minority shareholders in the same company. The difference of course being one of magnitude and that the investors are likely more diversified.