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Cables are attached to an application-specific integrated circuit (ASIC) device and power unit, manufactured by Bitmain Technologies Inc., at a cryptocurrency mining facility in Incheon, South Korea, on Friday, Dec. 15, 2017. Hedge funds are pulling out of gold bets as more exciting moves in equities and cryptocurrencies make safe-haven investments look boring. Photographer: SeongJoon Cho/Bloomberg via Getty Images

Cables are attached to an application-specific integrated circuit (ASIC) device and power unit, manufactured by Bitmain Technologies Inc., at a cryptocurrency mining facility in Incheon, South Korea, on Friday, Dec. 15, 2017. Hedge funds are pulling out of gold bets as more exciting moves in equities and cryptocurrencies make safe-haven investments look boring. Photographer: SeongJoon Cho/Bloomberg via Getty Images

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Application-specific integrated circuit (ASIC) devices and power units, manufactured by Bitmain Technologies Inc., sit on shelves at a cryptocurrency mining facility in Incheon, South Korea, on Friday, Dec. 15, 2017. Hedge funds are pulling out of gold bets as more exciting moves in equities and cryptocurrencies make safe-haven investments look boring. Photographer: SeongJoon Cho/Bloomberg via Getty Images

Application-specific integrated circuit (ASIC) devices and power units, manufactured by Bitmain Technologies Inc., sit on shelves at a cryptocurrency mining facility in Incheon, South Korea, on Friday, Dec. 15, 2017. Hedge funds are pulling out of gold bets as more exciting moves in equities and cryptocurrencies make safe-haven investments look boring. Photographer: SeongJoon Cho/Bloomberg via Getty Images

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Seo Hee-jin inspects an application-specific integrated circuit (ASIC) device and power unit, manufactured by Bitmain Technologies Inc., at her cryptocurrency mining facility in Incheon, South Korea, on Friday, Dec. 15, 2017. Hedge funds are pulling out of gold bets as more exciting moves in equities and cryptocurrencies make safe-haven investments look boring. Photographer: SeongJoon Cho/Bloomberg via Getty Images

Seo Hee-jin inspects an application-specific integrated circuit (ASIC) device and power unit, manufactured by Bitmain Technologies Inc., at her cryptocurrency mining facility in Incheon, South Korea, on Friday, Dec. 15, 2017. Hedge funds are pulling out of gold bets as more exciting moves in equities and cryptocurrencies make safe-haven investments look boring. Photographer: SeongJoon Cho/Bloomberg via Getty Images

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Wu Jihan, co-founder of Bitmain Technologies Ltd., speaks at the Shape the Future: Blockchain Global Summit in Hong Kong, China, on Wednesday, Sept. 20, 2017. Bitcoin captivated the attention of financial markets this summer as the developer community embraced a new mechanism to improve usage and avoided what was labeled as a potential civil war, raising the profile of the digital ledger and fueling the speculative price rise. Photographer: Anthony Kwan/Bloomberg via Getty Images

Wu Jihan, co-founder of Bitmain Technologies Ltd., speaks at the Shape the Future: Blockchain Global Summit in Hong Kong, China, on Wednesday, Sept. 20, 2017. Bitcoin captivated the attention of financial markets this summer as the developer community embraced a new mechanism to improve usage and avoided what was labeled as a potential civil war, raising the profile of the digital ledger and fueling the speculative price rise. Photographer: Anthony Kwan/Bloomberg via Getty Images

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Technicians stand in a cooling chamber adjacent to a wall of bitcoin mining machines at a mining facility operated by Bitmain Technologies Ltd. in Ordos, Inner Mongolia, China, on Friday, Aug. 11, 2017. BitmainĀ is one of the leading producers of bitcoin-mining equipment and also runs Antpool, a processing pool that combines individual miners from China and other countries, in addition to operating one of the largest digital currency mines in the world. Photographer: Qilai Shen/Bloomberg via Getty Images

Technicians stand in a cooling chamber adjacent to a wall of bitcoin mining machines at a mining facility operated by Bitmain Technologies Ltd. in Ordos, Inner Mongolia, China, on Friday, Aug. 11, 2017. BitmainĀ is one of the leading producers of bitcoin-mining equipment and also runs Antpool, a processing pool that combines individual miners from China and other countries, in addition to operating one of the largest digital currency mines in the world. Photographer: Qilai Shen/Bloomberg via Getty Images