Bitcoin plunged to a six-week low Tuesday after comments from South Korea's finance minister renewed worries about a crackdown in one of the largest markets for digital currency trading. In a radio program interview, South Korean Finance Minister Kim Dong-yeon said that "the shutdown of virtual currency exchanges is still one of the options" the government has. CNBC reports: Bitcoin dropped more than 17 percent to a low of $11,182.71 on Tuesday, falling below $12,000 for the first time since December 5, according to CoinDesk. CoinDesk's bitcoin price index tracks prices from cryptocurrency exchanges Bitstamp, Coinbase, itBit and Bitfinex. As of 12:13 p.m. ET, bitcoin was trading more than 13 percent lower at $11,759.73 a coin, according to CoinDesk. Trading in South Korean won accounted for about 4 percent of bitcoin trading volume, according to CryptoCompare. U.S. dollar-bitcoin trading had the largest share at 40 percent, the website showed. Other major digital currencies including ethereum and ripple also fell significantly. According to CoinMarketCap data, ethereum was trading at $1,051.83, down more than 20 percent in the last 24 hours, before lifting slightly to $1,117.72. Ripple fell almost 27 percent to $1.33 a token before recovering slightly to $1.36.