If you are an early adopter, which most of us arent, you would be not question these guys on their wealth.
Its a similar thing where you get in a stock very early, and if you gained from it I`m sure eventually you`d want more of it. Its human nature to have greed, or go on creating more things which microsoft has, or expanding their options.
Most of those guys are have done a great impact by creating jobs in the private sector.
People who can control their emotions, and who know how to invest may not make those mistakes, though. They know when to get out, set specific goals, and stick to their strategies!