Review on Qtum by Julio Arvelo

Is another decentralized and open-source smart contracts platform and value transfer protocol. Uses proof-of-stake consensus, that means the node operators are rewarded for validating transactions. Stacked approach enables multiple virtual machines or run environments to operate on top of the blockchain. They employs a decentralized governance protocol allowing for blockchain parameters like the block size, block time, gas schedules, and the minimum gas price for contracts to be modified without requiring a fork.