Until very recently, virtual currency trading has been widely accepted in China. Billions of RMB in virtual currency have been traded online, and this amount has been increasing by 20% every year. The practice is so common that around the world, "Chinese Gold Farmers" have become a well-known staple of such popular multiplayer online games as World of Warcraft, and in many parts of the world, this is the image most commonly attributed to virtual currency trading. However, with the blossoming popularity of virtual currency trading in China, concerns have arisen that serious problems could stem from mixing virtual world economies with the real world's economy—problems such as inflation, money laundering, and gambling.