UCoin is a Proof of Work/Proof of Stake cryptocurrency using the x11 algorithm. it has a 20M supply and a 1 minute block time. The U stands for "Usable". Ucoin is a usable and user-friendly digital currency. This coin has been created not only for "geeks" and advanced users, but also for ordinary users. UCoin is usable and userfriendly digital currency. This coin has been created not only for "geeks", for advanced use, but even for ordinary users.