The Lamborghini driver in this video offers a pretty good metaphor with respect to the perils of do-it-yourself personal investing. Professionals are susceptible too, of course. As my friend Tadas Viskanta emphasizes in his fine new book, Abnormal Returns, and in his blog of the same name, investing is hard. Screwing up, on the other hand, is remarkably easy. Personal investing has never been more accessible. That’s a tremendous benefit, but a great risk too. Investors have tremendous access and power, but if it isn’t used well, disaster awaits just around the corner.