A Japanese virtual currency exchange which lost some 58 billion yen ($534 million) of its customers' holdings may be unable to offer to reimburse the lost funds, a representative of the exchange operator said Saturday.In one of the largest losses of cryptocurrency resulting from a hacking event, nearly all of the NEM currency held by the Tokyo-based exchange Coincheck disappeared early Friday.While the exchange has not disclosed the size of its asset base, the representative said, "In the worst case scenario, we may not be able to return clients' assets."Coincheck has said it detected a par…READ FULL ARTICLE