June 2019 – Bithumb Hack

Bithumb’s hack took place on June 19, with about $30 million in tokens stolen, according to Coin Telegraph. Although the exchange has promised that customers will see no impact on their wallets, as it has pledged to repay any lost coins, Bithumb has not come out unscathed. Indeed, although Bithumb was formerly the sixth-largest exchange around the world based on trade volumes but has since plunged to 10th place. The attack focused on Bithumb’s hot wallet, a storage mechanism less secure than a cold wallet system.

October 2014 – KipCoin Hack

January 2018 – Coincheck Hack