https://www.reuters.com/article/us-twitter-cyber-bitcoin-law-enforcement/focus-falls-on-bitcoin-trail-in-race-to-identify-twitter-hackers-idUSKCN24H2R4 >Hackers who targeted some of Twitter's top users to reap bitcoin worth $120,000 have likely left digital footprints that could offer clues for law enforcement agencies investigating the attack, three blockchain analysis companies told Reuters.