South Korea will come up with a set of measures to clamp down on the "irrational" investment craze for cryptocurrency here, the country's chief economic policymaker said Tuesday, with a potential shutdown of exchanges still on the table. "The government stance is that it needs to regulate cryptocurrency investment as it is a largely speculative investment," Finance Minister Kim Dong-yeon said in a radio program interview. "The shutdown of virtual currency exchanges is still one of the options (that the government has)," Kim said, adding that more consultations among government agencies are needed. The minister said ... (full story)