DC Universe 's Mind Bank has been granted a real - money banking license . Dual - currency economy allows for free exchange between virtual and real money . In March 2009 , GoldMoney launched a dedicated iPhone application allowing its account holders to exchange gold and silver units within minutes . Second Life can be profitable , but also suffers from real - world problems . Digital virtual currency may be promising , but still lacks support of technology .
DC Universe 's Mind Bank has been granted a real - money banking license . Dual - currency economy allows for free exchange between virtual and real money . Second Life can be profitable , but also suffers from real - world problems . Digital virtual currency may be promising , but still lacks support of technology .