Individual, or "angel" investors are the largest source of seed and startup capital. However, many of these investors’ experiences are frustrating. The three main challenges for angel investment are diversification, valuation, and monitoring of portfolio company growth. This article explains opportunities as well as challenges for "angel" investing.

Profiles the investing career of Peter Thiel. He sold Paypal then went on to start a very successful hedge fund, Clarium Capital, and is now innovating in the venture capital field with the Founders Fund.