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 that with some countries deliberately devaluing their currencies other countries may retaliate thus causing a "trade war", and he urged Swann to alert "all of these other major countries to the very damaging implications of a currency war". During the IMF meeting there was disagreement based on conflicting views about how to sustain a recovery from the global recession. Countries led by the United States preferred flexible exchange rates, while others, led by China, resisted calls to appreciate their currency. The IMF meeting in Washington DC was inconclusive, as China rejected calls to allow rapid appreciation of its currency. Currency