CurrencyFromWikipedia,thefreeencyclopediaJumptonavigationJumptosearchGenerallyacceptedmediumofexchangeforgoodsorservicesForotheruses,seeCurrency(disambiguation).LookupcurrencyinWiktionary,thefreedictionary.NumismaticsCurrencyCoinsBanknotesForgeryListISOCirculatingcurrenciesAfricaTheAmericasEuropeAsiaOceaniaLocalcurrenciesCompanyscripLETSTimedollarsFictionalcurrenciesProposedcurrenciesHistoryHistoricalcurrenciesGreekRomanChinaIndiaPersianTibetanThaiFilipinoMalayByzantineMedievalcurrenciesProductionMintDesignersCoiningMillingHammeringCastExonumiaCreditcardsMedalsTokensChequesNotaphilyBanknotesScripophilyStocksBondsGlossaryofnumismatics Numismaticsportal MoneyportalvteAcurrency[a]inthemostspecificsenseismoneyinanyformwheninuseorcirculationasamediumofexchange,especiallycirculatingbanknotesandcoins.[1][2]Amoregeneraldefinitionisthatacurrencyisasystemofmoney(monetaryunits)incommonuse,especiallyforpeopleinanation.[3]Underthisdefinition,U.S.dollars(US$),euros(€),Indianrupee(₹),Japaneseyen(¥),andpoundssterling(£)areexamplesofcurrencies.Currenciesmayactasstoresofvalueandbetradedbetweennationsinforeignexchangemarkets,whichdeterminetherelativevaluesofthedifferentcurrencies.[4]Currenciesinthissensearedefinedbygovernments,andeachtypehaslimitedboundariesofacceptance.Otherdefinitionsoftheterm"currency"appearintherespectivesynonymousarticles:banknote,coin,andmoney.Thisarticleusesthedefinitionwhichfocusesonthecurrencysystemsofcountries.Onecanclassifycurrenciesintothreemonetarysystems:fiatmoney,commoditymoney,andrepresentativemoney,dependingonwhatguaranteesacurrency'svalue(theeconomyatlargevs.thegovernment'sphysicalmetalreserves).Somecurrenciesfunctionaslegaltenderincertainpoliticaljurisdictions.Otherssimplygettradedfortheireconomicvalue.DigitalcurrencyhasarisenwiththepopularityofcomputersandtheInternet.Whetherdigitalnotesandcoinswillbesuccessfullydevelopedremainsdubious.[5]Decentralizeddigitalcurrencies,suchascryptocurrenciesarenotlegalcurrency,strictlyspeaking,sincetheyarenotissuedb