Digital currency founded DigiCash, an electronic cash company, in Amsterdam to commercialize the ideas in his research. It filed for bankruptcy in 1998. In 1999, Chaum left the company. In 1997, Coca-Cola offered buying from vending machines using mobile payments. After that PayPal emerged in 1998. Other systems followed suit, such as e-gold, but it faced issues because it was used by criminals and was closed by U.S Department of Justice in 2005. In 2008, bitcoin was introduced, which marked the start of digital currencies. Origins of digital currencies date back to the 1990s Dot-com bubble. One of the first was E-gold,
Reserve currency Russia and the People's Republic of China, central banks, and economic analysts and groups, such as the Gulf Cooperation Council, have expressed a desire to see an independent new currency replace the dollar as the reserve currency. On 10 July 2009, Russian President Medvedev proposed a new 'world currency' at the G8 meeting in London as an alternative reserve currency to replace the dollar. China, Russia, India, Turkey, Brazil, Venezuela and other oil-producing countries have recently agreed "to transact all of their mutual trade and investment in their own currencies" effectively minimizing the need, at least in the short term,