TO GO WITH "CHINA-INTERNET-CURRENCY-BITCOIN" STORY BY AMANDA WANG Photo taken on December 4, 2013 shows Bobby Lee, CEO and Co-Founder of BTC China, China's bitcoin exchange at his office in Shanghai. Chinese investors are pouring billions into the virtual Bitcoin currency, driving its price to almost the level of an ounce of gold, but stoking fears of a huge and unsustainable bubble. AFP PHOTO/Peter PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)
TO GO WITH "CHINA-INTERNET-CURRENCY-BITCOIN" STORY BY AMANDA WANG Photo taken on December 4, 2013 shows Bobby Lee, CEO and Co-Founder of BTC China, China's bitcoin exchange at his office in Shanghai. Chinese investors are pouring billions into the virtual Bitcoin currency, driving its price to almost the level of an ounce of gold, but stoking fears of a huge and unsustainable bubble. AFP PHOTO/Peter PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)
TO GO WITH "CHINA-INTERNET-CURRENCY-BITCOIN" STORY BY AMANDA WANG Photo taken on December 4, 2013 shows Bobby Lee, CEO and Co-Founder of BTC China, China's bitcoin exchange at his office in Shanghai. Chinese investors are pouring billions into the virtual Bitcoin currency, driving its price to almost the level of an ounce of gold, but stoking fears of a huge and unsustainable bubble. AFP PHOTO/Peter PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)
