https://www.reuters.com/article/us-japan-cryptocurrency-cybercrime/exclusive-coincheck-hackers-start-moving-stolen-cryptocurrency-executive-idUSKBN1FJ28Y >Hackers behind last week's $530 million cryptocurrency heist -- one of the biggest ever -- have started to move and are trying to sell some of the stolen "XEM" coins, the vice president of the foundation behind the digital currency said on Tuesday.