Two weeks ago at the DeFi Security Summit, Trail of Bits’ Josselin Feist (@Montyly) was asked if we’d see a billion-dollar exploit in 2025. His response: “If it happens, it won’t be a smart contract, it’ll be an operational security issue.”Today, that prediction was validated.The AttackOn February 21, 2025, cryptocurrency exchange Bybit suffered the largest cryptocurrency theft in history when attackers stole approximately $1.5B from their multisig cold storage wallet. At this time, it appears t...