Mt. Gox controversies
Controversies tied to this brand in public sources. A listing is not a finding of fault.
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2015
Criminal case involving Mark Karpelès
Karpelès was arrested and prosecuted in Japan. The later conviction concerned falsification of financial records; he was acquitted of several other charges.
2014
Loss and theft of customer bitcoins
Mt. Gox reported that approximately 850,000 bitcoins were missing, later revising the shortfall after finding about 200,000 bitcoins in an older wallet. Subsequent security research concluded that most or all of the missing coins had been stolen gradually from the exchange's hot wallet.
2011
Account breach and fraudulent trading
A security incident exposed user data and enabled unauthorized activity, including a fraudulent sell-off that briefly reduced the exchange's displayed Bitcoin price to one cent.