Mt. Gox collapse: the first big crypto exchange failure

How did Mt. Gox become the main bitcoin exchange?

Mt. Gox launched on 18 July 2010 under the programmer Jed McCaleb, who sold it to Mark Karpelès in March 2011. Bitcoin markets were young, and few platforms let users buy and sell. By April 2013, Mt. Gox handled over 70% of the world’s bitcoin trades.

A share of that size makes a platform a single point of failure. When most trades pass through one company, the safety of that company decides the safety of a large part of the market. The same concentration question applies today to the largest exchanges, and any reader can ask how much of a market passes through the few platforms that lead it.

What happened when Mt. Gox halted bitcoin withdrawals in 2014?

On 7 February 2014, Mt. Gox halted all bitcoin withdrawals. Customers could still see balances on screen but could not move their coins, and the platform with over 70% of trades became a closed door. The halt was the first public sign of the problem, and it started a period of 3 weeks in which customers waited for explanations.

On 28 February 2014, the company filed for bankruptcy protection in Tokyo, and on 9 March 2014 it filed in the United States. A withdrawal halt followed by a filing is a pattern that later crypto failures repeated, from lenders in 2022 to FTX in November 2022.

How many bitcoin did Mt. Gox lose at its collapse?

At the filing, the company said it had lost almost 750,000 customer bitcoins and about 100,000 of its own. In March 2014, 199,999.99 bitcoins were found in an old wallet, and the reported loss fell from 850,000 to 650,000.

The change shows why early numbers deserve caution. A company that cannot account for coins also cannot give a fixed total at once. When you cite the Mt. Gox loss, name the date of the figure and say whether it comes before or after the old wallet was found.

What did a court decide about Mt. Gox and its chief executive?

Mark Karpelès became chief executive after acquiring Mt. Gox in 2011. He was arrested in August 2015. On 14 March 2019, he was convicted of falsifying data to inflate holdings by $33.5 million, and he received a sentence of 30 months, suspended for 4 years.

The conviction concerned falsified data, a point on records and disclosure. It shows that a court can treat inaccurate reporting by an exchange as a crime in itself, apart from what became of the missing coins.

How long did Mt. Gox take to repay its creditors?

The claims-filing deadline expired on 6 April 2023, more than 9 years after the filing, with payments promised to begin before 31 October 2023. In September 2023, the company pushed the final payment deadline back a year, to 31 October 2024, and said some creditors could be paid earlier.

Bankruptcy timelines for exchanges run for years. A reader should treat any date as the latest known step and check the trustee’s notices for later changes. Patience is a feature of the process, not a sign that nothing is happening.

How should a reader interpret a withdrawal halt like Mt. Gox’s?

A halt can come from a technical fault, a security incident or a shortage of coins. From outside, the 3 look alike, because the company states one reason and customers cannot test it. The useful response is to note the date, save the company statements, and watch for a filing or an audit.

In the Mt. Gox case, 21 days separated the halt from the Tokyo filing. During that time, customers held balances on a screen and no coins in their wallets. Holding your own keys is the way to avoid that gap, and it carries its own duties of safekeeping.

How should you cite the Mt. Gox bitcoin loss in a report?

Give 3 items: the figure, its date and its category. The record separates customer bitcoins from the company’s own bitcoins, and it separates the figure before the old wallet was found from the figure after. A sentence such as: the reported loss fell from 850,000 to 650,000 bitcoins after 199,999.99 were found in March 2014 holds all 3 items.

This format protects your reader from outdated totals. It also shows the habit that the case rewards: treat every number in a crisis as a statement made at a moment, and update it when the next document arrives.

How does the Mt. Gox collapse compare with FTX?

Both cases involved an exchange with a large market role, a halt of withdrawals and a bankruptcy filing. In 2014, the market was small and few regulators paid attention. By 2022, exchanges served millions of customers and public authorities followed them closely.

The comparison shows what changed and what did not. Rules, audits and public attention grew. The need to ask where customer coins sit before a deposit stayed the same.

What does the Mt. Gox collapse teach a bitcoin holder today?

Lesson 1 is custody: coins on an exchange are a claim on the exchange. Lesson 2 is concentration: a platform with over 70% of trades drags the market with it when it fails. Lesson 3 is records: falsified data was the finding of the court.

The EQOS Asia method page explains how a structured score turns such lessons into checks, and the contact page lets you bring a custody question from your own treasury.

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About the author

Stéphane Jambu

President, EQOS Forecast Asia

Stéphane Jambu leads EQOS Forecast Asia and works as a consultant in e-commerce, search visibility, and AI. LinkedIn profile