I see P2P being a great entry investment vehicle. Investing in stock requires more time, effort and knowledge. Not everyone has the inclination to be such an active investor. So I think P2P is great for students, fresh grads and the general population who aren't as adept in the intricacies of the stock market and other more complex instruments, while slowly learning about diversification and building an appetite for risk... especially with forums like these where they can learn more from other savvy investors like you guys!
Let's also not forget that at the end of the day, we are helping SMEs and the economy! Purpose-driven investing, while hopefully making a good return out of it.