PPCoin, yet another cryptocurrency inspired from bitcoin. PPCoin aims to achieve high energy-efficiency while keeping as much as the official Bitcoin properties as possible. For example, as of April 2013 Bitcoin miners were consuming

PPCoin, yet another altcoin in the town, PPC is the first crypto-currency based on a combination of Proof of Stake/Proof-of-work system. As on May 2013, PPCoin had a market cap of $4 million USD,