According to Foresight News, Yonhap News Agency cited data submitted by Upbit operator Dunamu, and reported that South Korean cryptocurrency exchange Upbit has suffered 159,661 hacker attacks in the first half of this year, 2.17 times that of last year. Upbit lost about 58 billion won in hacker attacks in 2019. Dunamu said that it has since controlled the proportion of cold wallets to more than 70%.