Nearly $4 billion has been wiped off of the value of bitcoin in the past four days after a correction that has seen the cryptocurrency's price fall almost 19 percent from its recent record high. On May 24, bitcoin hit an all-time high of $2.791.69. But on Monday, the digital currency was trading at an intra-day high of $2,267.73, marking a more than $520 drop or 18.7 percent decline since the record high, according to data from CoinDesk. "The correction was actually quite brief, the prices today are still higher than that of a week ago," Bobby Lee, CEO of BTCC, a major bitcoin exchange, told CNBC by phone. "I think ... (full story)