Peercoin, also known as PPCoin, is a peer-to-peer cryptocurrency, inspired by Bitcoin, and it shares much of the source code and technical implementation of Bitcoin, unlike Bitcoin, Peercoin does not have a hard limit on the number of possible coins though. PPCoin presents itself as an improvement upon Bitcoin. So, what is the real value of it?

http://www.cryptobang.com/2014/09/11/what-is-the-real-value-of-peercoin/