As the peer-to-peer lending industry matures, the big financial firms peer-to-peer had set out to bypass have come to dominate the industry's investor pool. More than 80 percent of the loans issued on peer-to-peer marketplace Prosper went to those firms. The big players’ entry runs counter to the original notion of the sector as a populist alternative to the high stakes world of Wall Street. The original investors are now outgunned by the cash-rich, algorithm-wielding financial firms. Like high-frequency trading, peer-to-peer lending has become a game of speed. The dynamics taking shape — high demand for riskier loan categories, hedge funds leveraging and securitizing their investments — have inspired comparisons to the mortgage crisis.