According to ChainCatcher, security firm CertiK recently recommended that crypto exchanges set hard dollar limits on hot wallet holdings rather than relying solely on cold storage ratios as a security measure. The recommendation follows recent disclosures by major exchanges seeking to reassure customers after a record-breaking hack targeting Binance's hot wallet. Gate reported that 88.26% of its total assets are held in cold storage, while Coinbase disclosed that over 99% of customer assets are stored offline.
CertiK's research team told Cointelegraph that cold storage is an effective indicator of online risk exposure but not an independent security score. The firm suggested exchanges set hot wallet caps based on the strictest of three limits: a percentage of customer liabilities, estimated withdrawal demand, and an absolute loss ceiling based on the exchange's financial resources. Separately, Binance said last week it supplemented approximately 98% of affected tokens following the hack and absorbed the losses itself, with remaining tokens requiring longer retrieval times.