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,
Currency War of 2009–11 fast that it would lead to social unrest in China, bankruptcy for export dependent companies and "disaster for the world". In October, China posted a record surge in its foreign exchange reserves, which was seen as a "target around the neck of China’s exchange rate regime" in the effort to get the country to allow its currency to appreciate. In reaction, Geithner suggested China’s attempts at limiting gains were the reason for capital controls and currency-market interventions in other emerging economies. "What’s happening is, as China holds its currency down, their currencies are moving up and they’re having to work