Digital currency destabilizing effect on the Chinese Yuan currency due to speculation. Recent interest in cryptocurrencies has prompted renewed interest in digital currencies, with bitcoin, introduced in 2008, becoming the most widely used and accepted digital currency. According to the European Central Bank's 2015 "Virtual currency schemes – a further analysis" report, virtual currency is a digital representation of value, not issued by a central bank, credit institution or e-money institution, which, in some circumstances, can be used as an alternative to money. In the previous report of October 2012, the virtual currency was defined as a type of unregulated, digital money,
Digital gold currency transaction, while PayPal transfers, for example, could be considered more similar to credit card transactions. The advantage of this arrangement is that the operating costs of the digital currency system are greatly reduced by not having to resolve payment disputes. Additionally, it allows digital gold currency transactions to clear instantly, making the funds available immediately to the recipient. By contrast, credit cards, checks, ACH and other reversible payment methods generally have a "clearing time" of 72 hours or more. As with all financial media, there are several types of risk inherent to the use of DGCs: management risk, political risk,