#Bithumb disclosed a promotional system error on Feb 6 that mistakenly credited ~620,000 $BTC across 695 internal user accounts instead of small KRW rewards.

Trading was halted within ~35 minutes. About 1,788 $BTC was briefly sold before the freeze, with 99.7% of funds recovered internally and remaining losses covered by the exchange.

No onchain transfers occurred. This was an internal accounting glitch, not a wallet breach or blockchain issue.