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A common bitcoin logo. The price for BTC/USD on the Mt.Gox exchange Bitcoin (sign: BTC ) is a decentralized digital currency [ 8 ] [ 9 ] based on an open-source , [ 10 ] peer-to-peer internet protocol . It was introduced by a pseudonymous developer named Satoshi Nakamoto in 2009. [ 11 ]
Conheça o Bitcoin, dinheiro virtual usado até em site de venda de drogas - notícias em Tecnologia e GamesO “bit” no nome Bitcoin não tem apenas relação com o fato de a moeda ser “virtual” – afinal, em uma época com tantos cartões de crédito e mais números em contas bancárias do que papel, a “virtualidade” do dinheiro não poderia ser um privilégio do Bitcoin. O “bit” vem do “BitTorrent”, uma rede ponto a ponto (P2P), sem um ponto central, em que essencialmente cada internauta participante tem o mesmo valor e é anônimo. O Bitcoin não tem uma central de gerenciamento, diferente das moedas como o real, que é gerenciada pelo Banco Central.
In monetary economics , the quantity theory of money is the theory that money supply has a direct, proportional relationship with the price level. For example, if the currency in circulation increased, there would be a proportional increase in the price of goods. The theory was challenged by Keynesian economics , [ 1 ] but updated and reinvigorated by the monetarist school of economics . While mainstream economists agree that the quantity theory holds true in the long run , there is still disagreement about its applicability in the short run . Critics of the theory argue that money velocity is not stable and, in the short-run, prices are sticky , so the direct relationship between money supply and price level does not hold.
In economics , the money supply or money stock , is the total amount of monetary assets available in an economy at a specific time. [ 1 ] There are several ways to define "money," but standard measures usually include currency in circulation and demand deposits (depositors' easily accessed assets on the books of financial institutions). [ 2 ] [ 3 ] Money supply data are recorded and published, usually by the government or the central bank of the country. Public and private sector analysts have long monitored changes in money supply because of its effects on the price level , inflation , the exchange rate and the business cycle . [ 4 ]
Yuan dynasty banknotes were the earliest fiat money. Fiat money is money that derives its value from government regulation or law. The term fiat currency is used when the fiat money is used as the main currency of the country.