This was big at the time. With today's value of BTC - it's staggering.
650,000 coins at the current price (02/19/21) = $36,270,000,000 (US)
Mt. Gox announced that approximately 850,000 bitcoins belonging to customers and the company were missing and likely stolen, an amount valued at more than $450 million at the time. Although 200,000 bitcoins have since been "found"