Syscoin (SYS) is a decentralized cryptocurrency and blockchain platform that aims to provide fast, low-cost transactions and secure asset trading. It utilizes a hybrid proof-of-work/proof-of-stake consensus mechanism and supports a wide range of features such as decentralized marketplaces, encrypted messaging, and token creation. Syscoin is designed to be scalable and interoperable with other blockchains, offering users a versatile platform for various decentralized applications and services.