Americans celebrate the success of the world’s billionaires. Love ‘em or hate ‘em, we can’t seem to get enough of them. We follow their words on Twitter ngIf: ticker TWTR +0.11% end ngIf: ticker, track their daily wealth, and immortalize them in films. Most earn their keep through unique insight and perseverance. But plenty hide an ugly truth. Let’s call it the dark side of entrepreneurship. This research paper highlights the risks and gains of investing in US and Non-US public equities controlled by Forbes Billionaires.