LONDON, ENGLAND – MAY 30: In this photo illustration, a visual representation of Bitcoin cryptocurrency is pictured on May 30, 2021 in London, England. Bitcoin is a decentralised digital currency, which has been in use since 2009. (Photo illustration by Edward Smith/Getty Images) Poly Network offers bug bounty to hacker who stole $600 million worth of cryptocurrency Poly Network said Friday that it had offered a $500,000 bounty to the hacker. Aug 13, 2021 By Tonya Riley