A hacker stole $340M in a crypto heist, then returned most of it

“The incident underscores the persistent vulnerabilities in decentralized finance infrastructure, with a white‑hat hacker exploiting a critical bug in Blockstream’s Liquid Network to siphon roughly 4,000 bitcoins—worth about $340 million at the time. Blockstream’s swift patch and the partial restitution of 3,400 coins demonstrate a rare case of responsible disclosure, yet the remaining 600 coins (≈$47 million) still pose a risk to the broader crypto ecosystem. For U.S. investors and regulators, the event highlights the need for stricter security audits and clearer liability frameworks for custodial services, especially as institutional adoption of crypto assets accelerates. The pause in Liquid Network operations also signals potential liquidity disruptions for exchanges that rely on the network for settlement, which could ripple into broader market volatility. Expert Analysis: This heist illustrates that even well‑established blockchain protocols are not immune to sophisticated attacks, reinforcing the urgency for the U.S. Treasury and SEC to mandate comprehensive security standards for crypto custodians. If enforced, such standards could reduce systemic risk and restore confidence among institutional participants over the next 12–18 months.”