PARIS: Cryptocurrency investors have been transfixed over the past few days by the antics of a mysterious hacker who stole more than $600 million — before giving some of it back. But is the thief a good samaritan who stole the money to expose a dangerous security flaw, or did they simply realise they were about to be caught? The hacker struck Poly Network, a company that handles cryptocurrency transfers, on Tuesday in one of the biggest thefts of digital monies in history. By Thursday they had returned some $342 million — still far short of the total, but enough to raise furious speculation ov…

Read More