Digital currency payment transfer in order to facilitate easy payment and give the payee more confidence in not letting go of their electronic wallet during the transaction. A cryptocurrency is a type of digital asset that relies on cryptography for chaining together digital signatures of asset transfers, peer-to-peer networking and decentralization. In some cases a proof-of-work or proof-of-stake scheme is used to create and manage the currency. Cryptocurrencies allow electronic money systems to be decentralized. The first and most popular system is bitcoin, a peer-to-peer electronic monetary system based on cryptography. A virtual currency has been defined in 2012 by the European
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