It turned out to be a sell-the-news event for the cryptocurrency market on Monday as Mt. Gox’s July repayment plan sent investors into panic. What Happened: Bitcoin plunged below $60,000 to hit its lowest level since early May. The dump was precipitated by defunct cryptocurrency exchange Mt. Gox’s repayment obligation to its creditors, threatening to flood the market with $9 billion in additional Bitcoins. Ethereum extended its downturn as well. Since the beginning of the month, the second-largest cryptocurrency has shed 12% of its gains made from the approval of spot ETFs. About $363 million …