📝 Executive Summary
Following a $6.36 billion hack of Binance's hot wallet infrastructure, major crypto exchanges are rushing to reassure users by disclosing cold storage ratios. Coinbase, Gate, and Upbit have reported holding between 88% and 99% of customer assets in offline storage to mitigate security concerns. While these disclosures aim to restore market confidence, regulators warn that cold storage is not a foolproof defense against insider threats or compromised signing systems.