Bitcoin continues to fall after South Korea regulators stepped into the market to rein in speculation. Bitcoin is down as much as 9% in Asia trading yesterday, to slightly more than $13,800. The digital currency is now off about 28% from its record high last week. South Korea has been at the heart of worldwide interest in bitcoin and other cryptocurrencies as prices skyrocketed this year.
Some estimates suggest South Korea's exchanges have accounted for more than 1/5 of global trading.
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