What is Zcoin (XZC)?
Could you elaborate on Zcoin (XZC) and its significance in the cryptocurrency landscape? I'm particularly interested in understanding its unique features and how it aims to distinguish itself from other digital currencies. Is Zcoin focused on privacy? Does it offer any novel technical solutions? Furthermore, how does the Zcoin community engage and promote the coin? What are the main use cases for Zcoin, and what kind of demand is there for its services? Additionally, could you highlight any key challenges that Zcoin faces and how it's addressing them? Thank you for providing a concise yet informative overview of Zcoin (XZC).