Hip hop stars are taking their reputations to Wall Street and Sand Hill road. Unlike their rock star brethren, who’ve historically been disinterested in dabbling with startups, quite a few hip hop artists have amassed good-sized portfolios. They’ve seen a few big hits too, most recently including a massive up round for zero-commission stock trading platform Robinhood, which counted Jay-Z, Nas and Snoop Dogg among its earlier backers. But just how deep does the hip hop-startup relationship go and where is it headed?