There are only so many multimillion-dollar homes one can buy… So what should Hollywood’s cash-heavy do with all those blockbuster payouts? Invest, of course. While some invest in real estate or the stock market, a handful of famous faces are getting very smart about investing their funds in the tech space. And a smaller subset is succeeding. From Bono to Stephen Fry, these nine celebs are making a killing in the startup world.