Hackers may have converted half of the NEM cryptocurrency stolen from Tokyo-based bourse operator Coincheck Inc. into other virtual coins for laundering, a cybersecurity expert said Saturday.The converted coins may have been exchanged to other virtual currencies or cashed by the hackers through the highly anonymous "dark web," making it even more difficult to track the stolen coins worth 58 billion yen ($547 million) at the time of the heist.The hackers set up a website on the dark web for trading virtual coins and began converting the NEM coins on Feb. 7. Transactions are still being made …READ FULL ARTICLE