Mt. Gox

Mt. Gox was a Tokyo-based cryptocurrency exchange whose name originated with an earlier, unrelated online trading service for Magic: The Gathering cards. Programmer Jed McCaleb registered the mtgox.com domain in 2007 for a proposed card-trading marketplace. After reading about Bitcoin in 2010, he repurposed the domain as a service for exchanging Bitcoin and conventional currencies, launching the exchange on 18 July 2010. McCaleb transferred control to French developer Mark Karpelès in March 2011. Under Karpelès, who operated the business from Japan, Mt. Gox expanded rapidly as Bitcoin adoption and prices increased. By 2013 and early 2014, it was widely regarded as the leading Bitcoin intermediary and was processing more than 70% of reported global Bitcoin trading activity. Its prominence gave the company considerable influence over Bitcoin liquidity and price discovery, but its infrastructure, banking relationships, compliance systems, and internal controls did not develop at the same pace. The exchange experienced serious security and operational problems well before its final collapse. A 2011 breach exposed user information and enabled fraudulent trading, while additional incidents, payment reversals, banking restrictions, and withdrawal delays damaged customer confidence. Mt. Gox also faced difficulties with United States money-transmission rules and with payment processors. In 2013, U.S. authorities seized funds connected with its American operations, and dollar withdrawals became increasingly unreliable. Bitcoin withdrawals were halted on 7 February 2014. Mt. Gox initially attributed the suspension to transaction malleability, a technical issue that could make a transaction appear unsuccessful even after the coins had been transferred. On 24 February, the exchange stopped trading and its website went offline. A leaked internal document indicated that the company was insolvent and had lost approximately 850,000 bitcoins, including customer and corporate holdings. Mt. Gox subsequently reported that about 200,000 bitcoins had been located in an older wallet, reducing the reported shortfall to approximately 650,000 bitcoins. The company entered civil rehabilitation and bankruptcy proceedings in Japan in February 2014 and began liquidation proceedings in April. Investigations later concluded that most or all of the missing bitcoins had probably been removed from the exchange's hot wallet over an extended period beginning in late 2011. The collapse generated lawsuits from creditors, criminal proceedings involving Karpelès, and prolonged trustee-led rehabilitation and distribution efforts. Karpelès was convicted in Japan in 2019 of falsifying financial records and received a suspended prison sentence, although he was acquitted of several other charges. Mt. Gox's failure became one of the defining scandals of early cryptocurrency history. It exposed the risks of centralized custody, weak exchange governance, inadequate security segregation, opaque accounting, and dependence on fragile banking arrangements. The event also influenced Japan's development of formal rules for cryptocurrency exchanges and virtual-asset businesses. The Mt. Gox brand is no longer an operating exchange; its remaining public significance is associated with creditor rehabilitation, asset recovery, and the continuing legal consequences of the collapse.

The mtgox.com domain was registered by programmer Jed McCaleb in January 2007 for a proposed Magic: The Gathering card-trading service. That project operated only briefly and was later abandoned. McCaleb reused the domain in 2009 for a separate game-related purpose, then converted it into a Bitcoin exchange after learning about Bitcoin in 2010. Mt. Gox launched its Bitcoin trading service on 18 July 2010. In March 2011, McCaleb sold the operation to Mark Karpelès, a French developer living in Japan. The new operator expanded the exchange during Bitcoin's early growth period. Mt. Gox became a major venue for trading Bitcoin against national currencies and eventually handled more than 70% of reported worldwide Bitcoin transactions. Its scale made it an important part of the early Bitcoin ecosystem, but its operating model was affected by recurring security incidents and weaknesses in financial and technical controls. A significant breach occurred in 2011. User information was leaked, accounts were compromised, and fraudulent activity caused the exchange's displayed Bitcoin price to collapse temporarily. Further losses and technical problems followed. In 2013, Mt. Gox experienced difficulties with Dwolla and other payment channels, while U.S. authorities seized funds associated with an unregistered money-transmission operation. Dollar withdrawals were suspended or delayed, and customers increasingly complained that funds were inaccessible for weeks or months. In February 2014, Mt. Gox halted Bitcoin withdrawals and blamed transaction malleability for the immediate technical problem. The exchange then suspended all trading, closed its website, and acknowledged that it could not continue normal operations. On 28 February 2014, it sought civil rehabilitation in Japan, reporting substantial liabilities and the loss of approximately 850,000 bitcoins. About 200,000 bitcoins were later found in an older wallet. In April, the company abandoned its attempted rehabilitation and moved into liquidation. The precise cause of the shortfall was initially disputed. Later analysis by WizSec indicated that coins had been drained from Mt. Gox's hot wallet over a long period, beginning in late 2011. The collapse led to claims by approximately 127,000 creditors, litigation in several jurisdictions, and criminal proceedings against Karpelès. In March 2019, a Japanese court found him guilty of falsifying records but suspended his prison sentence and rejected several other accusations. The bankruptcy trustee continued efforts to identify assets, sell or preserve recovered cryptocurrency, and administer creditor claims. The event helped prompt Japan to establish a formal regulatory framework for cryptocurrency exchanges. Mt. Gox is now defunct, although its bankruptcy and creditor-rehabilitation process remains historically important to the cryptocurrency sector.

• 2019

  Former CEO convicted of falsifying records

  [1]Mt. Goxen.wikipedia.org

  The Tokyo District Court convicted Karpelès of manipulating financial data and issued a suspended sentence.

• 2014

  Trading ends and bankruptcy proceedings begin

  [1]Mt. Goxen.wikipedia.org

  Mt. Gox halted withdrawals and trading, went offline, and entered Japanese civil rehabilitation before liquidation.

• 2013

  Mt. Gox reaches dominant market position

  [1]Mt. Goxen.wikipedia.org

  The exchange handled more than 70% of reported global Bitcoin trading during its peak period.

• 2011

  Ownership passes to Mark Karpelès

  [1]Mt. Goxen.wikipedia.org

  McCaleb transferred the exchange to Karpelès, who operated it from Japan.

• 2010

  Bitcoin exchange launches

  [1]Mt. Goxen.wikipedia.org

  Mt. Gox began operating as a Bitcoin exchange on 18 July.

• 2007

  mtgox.com domain registered

  [1]Mt. Goxen.wikipedia.org

  Jed McCaleb registered the domain for a proposed Magic: The Gathering card-trading service.

Historically positioned as a high-volume international Bitcoin exchange and, at its peak, the dominant venue for Bitcoin trading and liquidity.

• Cryptocurrency exchange · 2010

  Mt. Gox Bitcoin Exchange

  The company's principal service was an online marketplace for buying and selling Bitcoin against conventional currencies. Customers could place trades, hold balances, deposit funds, and request withdrawals. At its peak, the exchange was one of the most important sources of Bitcoin liquidity worldwide, but its custody, security, payment-processing, and withdrawal systems proved unable to withstand sustained operational and criminal pressures.

• Digital-asset custody · 2010

  Bitcoin custody and withdrawal service

  Mt. Gox held customer Bitcoin within exchange-controlled wallets and processed deposits and withdrawals. The distinction between hot and cold storage became central to the collapse, as investigators later concluded that most or all of the missing coins were taken over time from a hot wallet.

• 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.

  Source

• 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.

  Source

• 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.

  Source

Read more

• 2014

  Suspend withdrawals and tradingOther

  Background

  The exchange faced prolonged withdrawal delays and a technical crisis that it attributed initially to transaction malleability.

  Action taken

  Mt. Gox halted Bitcoin withdrawals on 7 February, stopped all trading on 24 February, and took its website offline.

  Aftermath

  The suspension preceded bankruptcy protection, liquidation, creditor claims, and investigations into the disappearance of hundreds of thousands of bitcoins.

  • Multiple major Bitcoin exchanges — Several exchanges issued a joint statement distancing themselves from Mt. Gox shortly before its website went offline.

  Source

• 2014

  Enter Japanese civil rehabilitation and liquidationOther

  Background

  Mt. Gox reported insolvency after identifying a large shortfall in customer and corporate Bitcoin holdings.

  Action taken

  The company filed for civil rehabilitation in Japan on 28 February and later requested liquidation after abandoning its restructuring plan.

  Aftermath

  A trustee was appointed to recover assets and administer claims from creditors around the world.

  Reported liabilities. Approximately 6.5 billion yen (At the February 2014 bankruptcy filing)

  Source

• 2010

  Repurpose the mtgox.com domain for Bitcoin tradingStrategy

  Background

  After learning about Bitcoin, Jed McCaleb concluded that the emerging community needed a marketplace connecting Bitcoin with conventional currencies.

  Action taken

  The dormant card-trading domain was converted into a Bitcoin exchange and price-quotation service.

  Aftermath

  The decision created one of the earliest large-scale Bitcoin exchanges and eventually made Mt. Gox the dominant trading venue.

  Source

• 2020.03.25

  Reported2020.03.25

  Mt. Gox proposes a creditor repayment plan[2]Mt. Gox提出债权人偿付方案finance.sina.com.cn

  Mt. Gox circulated a draft proposing that creditors choose repayment in fiat currency or a combination of fiat currency, Bitcoin and Bitcoin Cash. The draft said other cryptocurrencies, including BSV, would be sold; the proposal had not yet been approved.

Read more

1. 1Mt. Goxen.wikipedia.org
2. 2Mt. Gox提出债权人偿付方案finance.sina.com.cn