South Korea's largest crypto exchange, Upbit, plans to increase its cold wallet storage ratio to 99% following a November 27 hack that resulted in a loss of approximately 44.5 billion won ($31 million) in Solana-based assets. Operator Dunamu stated the exchange currently holds 98.33% of customer assets in cold storage and aims to reduce hot wallet holdings below 1% in the coming months, exceeding both domestic regulatory requirements and the standards of many global exchanges.