Virtual Currency
A virtual currency is a unit of account for some aspect of a virtual economy. For example, the gold you can earn within World of Warcraft is a currency that may be used to purchase other virtual items within the closed economy of the game.
Typically, you do not actually “own” virtual currency: you are granted a license to make use of the currency in whatever way the game or experience has decided. Some blockchain-based experiences that use cryptocurrency which may be used within the experience, as well as traded through decentralized exchanges.