Mt. Gox shuffles 30,000 Bitcoin between wallets as BTC price nears $82,000: Arkham

Mt. Gox was once the world’s leading cryptocurrency exchange, initially handling over 70% of all Bitcoin transactions. In early 2014, hackers attacked the exchange, resulting in the loss of approximately 740,000 bitcoins (more than $15 billion at current prices). This hack was the largest of many attacks on exchanges between 2010 and 2013.