The Mt. Gox hack was one of the first major cryptocurrency hacks. In 2011, hackers made off with 25,000 Bitcoins valued at around $400,000. The exchange handled nearly 70% of all Bitcoin transactions at that time.
In 2014, Mt. Gox experienced another attack which resulted in the loss of nearly 650,000 of its customers’ Bitcoins and about 100,000 of its own. This amounted to approximately 7% of all bitcoins in circulation at the time, valued at around $473 million.
Tokyo-based Mt. Gox, formerly the world’s largest Bitcoin exchange, declared bankruptcy in 2014, leaving creditors owed 45 billion yen ($414 million). Recently, the exchange transferred nearly $9 million, possibly to repay its creditors.