Decred (DCR)

Decred is an autonomous digital currency. With a hybrid consensus system, it is built to be a decentralized, sustainable, and self-ruling currency where stakeholders make the rules. ... Secure. Decred employs an innovative hybrid Proof-of-Work/Proof-of-Stake system that layers security and carefully aligns incentives. This system yields the best of both worlds, making it an order of magnitude more expensive to attack than pure Proof-of-Work or pure Proof-of-Stake