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,
Currency War of 2009–11 the extent of hostility, but the term has been widely used by the media since Brazil's finance ministers Guido Mantega September 2010 announcement that a "currency war" had broken out. Other commentators including world statesmen such as Manmohan Singh and Guido Mantega suggested a "currency war" was indeed underway and that the leading participants are China and the US, though since 2009 many other states have been taking measures to either devalue or at least check the appreciation of their currencies. The US does not acknowledge that it is practicing competitive devaluation and its official policy is to let the