Hackers have stolen $ 100 million worth of  cryptocurrency companies based in California in the latest big-money hacks in the digital currency industry.
 An unidentified thief hits a "bridge" — a program that allows  cryptocurrency transfers — related company Harmony announced on Twitter Thursday night.
 "Harmony is working 24 hours a day as we continue to investigate with the FBI and several cybersecurity companies," said a company specializing in blockchain technology that underpins cryptocurrency transactions. ..
 Harmony joins the long list of crypto companies looted by hackers for  millions of dollars at a time. Hackers have stolen more than $ 1 billion from crypto bridges this year alone,  according to Elliptic, who tracks transactions on the blockchain. According to Elliptic, the
 Cryptocurrency Bridge is a major target for hackers as it stores a large amount of liquidity.
 It is unknown who plundered Harmony's digital cash register. The
  FBI accused the North Korean government-backed hacker of hacking about $ 600 million in popular videos in April.