"Mt. Gox was a Bitcoin exchange based in Shibuya, Tokyo, Japan.[1] Launched in 2006 as a tradable card game service, Mt. Gox transitioned into a Bitcoin exchange by 2010 and handled over 70% of all Bitcoin transactions globally by early 2014.
In 2014, Mt. Gox was hacked, and thousands of Bitcoins were stolen; the company filed for bankruptcy shortly thereafter. The company reported that approximately 850,000 bitcoins were missing"
Wikipedia: https://en.wikipedia.org/wiki/Mt._Gox
Year 2024, and victims are about to be compensated with recovered $Bitcoins.