Crypto history, told plainly

Mt. Gox: the rise and fall

From 2010 to 2014, one exchange in Tokyo handled most of the world's bitcoin trading. Then about 850,000 coins went missing and the site went dark. Here is the full story: the rise, the fall, the decade long road to repayments, and the lessons every trader carries today.

Reviewed and current as of September 12, 2026

01A card trading site goes crypto

The story starts with a fantasy card game. In the late 2000s, programmer Jed McCaleb registered mtgox.com, short for Magic: The Gathering Online Exchange, as a place to trade game cards. When he discovered bitcoin in 2010, he saw a bigger use for the site: a real marketplace where early adopters could buy and sell the new digital money. In March 2011, McCaleb handed most of the company to French programmer Mark Karpelès and kept 12 percent for himself. The card site was now a bitcoin exchange, headquartered in Tokyo.

02The biggest game in town

Under Karpelès, Mt. Gox grew into the center of the bitcoin world. By 2013 it handled around 70 percent of all bitcoin trading on the planet, and its prices served as the global reference everyone watched. For years, if you wanted bitcoin, Mt. Gox was where you went. The exchange's order books moved markets, and its growing pains became the industry's growing pains.

03The first cracks

The first warning signs arrived early. In June 2011, an attacker breached the exchange and briefly pushed the price down to a single cent before the market bounced right back. By 2013, regulators had seized millions of dollars from company accounts, and customers noticed withdrawals moving more slowly. The signs were there for close watchers: a young company handling enormous sums, racing to keep pace with its own growth.

04The fall

In February 2014, Mt. Gox halted withdrawals, and the truth came out: about 850,000 bitcoin were gone, roughly 750,000 belonging to customers and 100,000 to the company itself, worth about $450 million at the time. On February 25 the website went dark, and on February 28 the company filed for court protection in Tokyo. A later search turned up about 200,000 bitcoin in an old wallet, coins that became the backbone of the estate's repayment plan.

Bitcoin's price fell hard in the weeks that followed, and the headlines were loud. Yet the network itself kept working exactly as designed, block after block, untouched by the exchange's fate.

05The long road back

Japan's courts placed the estate under the care of trustee Nobuaki Kobayashi and a civil rehabilitation plan. More than a hundred thousand creditors filed claims, and the wait stretched for years while courts sorted out who was owed what. In July 2024, a full decade later, repayments finally began: bitcoin and bitcoin cash flowed out through partner exchanges to tens of thousands of creditors, with yen distributions alongside. The process continues into 2026, a slow and careful return of what could be returned.

06What it means for you

Mt. Gox taught crypto its most lasting lessons, and the industry wrote them into its foundations. Exchanges now publish proof of reserves, Japan built the first formal licensing regime for trading platforms, and holding your own keys became the community's founding proverb. Every modern safeguard, from cold storage to withdrawal limits, carries a piece of this story.

When you choose a platform today, look for the lessons in action: published reserves, clear ownership of customer funds, and a track record of calm operation. History already paid the tuition for these habits. Your job is simply to collect the diploma.