Arkham Intelligence has revealed that 127,426 BTC, valued at $3.5 billion, was stolen from the LuBian mining pool in December 2020, marking it as one of the largest crypto heists in history. The firm suggests that weak private key generation may have allowed the theft to occur and notes that the stolen funds have largely remained untouched, with LuBian attempting to recover them by sending messages to the hacker. The current value of the stolen Bitcoin has risen to approximately $14.5 billion due to price appreciation since the theft.