Bithumb disclosed a June 2018 cryptocurrency theft initially estimated at about 35 billion KRW, with the exchange covering losses from company reserves while moving customer assets to cold wallets and suspending cryptocurrency and KRW withdrawals during containment. Follow-up reporting said recovery work was reducing the stolen amount and that Bithumb was replacing wallet systems, strengthening security with outside specialists, and cooperating with KISA, police, AhnLab, and other investigators, while linked trend reporting frames the case among major financial and cryptocurrency thefts with many such incidents remaining unattributed.