Users of the failed bitcoin exchange Mt. Gox have been trying to get their money back for a decade. From the beginning of July, the company will start paying out users’ funds.

Kiyoshi Ota | Bloomberg | Getty Images

Mount Gox, the Japanese bitcoin The exchange that went into bankruptcy a decade ago after a major hack is finally ready to pay creditors, who are being handsomely rewarded for their patience.

As many as 950,000 bitcoins were lost in the 2011 hack, at a time when the cryptocurrency was trading at a tiny fraction of its current value. About 140,000 of those coins have been recovered, a figure that at today’s prices means about $9 billion worth of bitcoin will be returned to its owners.

Among the plaintiffs is Illinois native Gregory Greene. Shortly after the exchange declared bankruptcy in February 2014, Greene filed a class action against Mt. Gox and his former CEO. Greene said at the time that his frozen account contained $25,000 worth of bitcoin, although he did not disclose the exact number of coins in his wallet.

Bitcoin was then traded at around US$600. Today it is worth more than US$60,000. This suggests that Greene’s lost stock, at current prices, would be worth about $2.5 million, a gain of 10,000%. However, it is unclear how much he will receive in payments, which are expected to begin rolling out in July.

John Glover, chief investment officer at crypto lending firm Ledn, said lenders are about to get a historic windfall.

“Many will clearly cash out and take advantage of the fact that having their assets tied up in the Mt. Gox bankruptcy was the best investment they ever made,” Glover told CNBC.

Mt. Gox was an online marketplace where people could buy or sell bitcoin using different currencies. At the height of its success, the platform was the largest spot bitcoin exchange in the world, claiming to handle around 80% of all global dollar-to-bitcoin trades.

The company, whose acronym was created from the name “Magic: The Gathering Online Exchange”, closed in February 2014 after a series of robberies.

Mt. Gox attributed the bitcoin disappearance to a bug in the cryptocurrency’s structure. While users received incomplete transaction messages when accessing the exchange, in reality the coins may have been illicitly withdrawn from their accounts by hackers, Mt. Gox said.

On Monday, the court-appointed administrator overseeing the exchange’s bankruptcy proceedings he said Distributions to the company’s roughly 20,000 creditors would begin next month. Disbursements would be made in a mix of bitcoin and bitcoin cash, an early offshoot of the original cryptocurrency.

Alex Thorn, head of research at crypto asset management firm Galaxy Digital, said in a note last month that the vast majority of lenders he spoke to said they will accept a payment in kind, i.e. in cryptocurrency rather than fiat. They will also largely hold the assets.

Many of the major rights holders of Mt. Gox assets, he said, are well-known in the bitcoin world. They include early Bitcoin investor Roger Ver, Blockstream co-founders Adam Back and Greg Maxwell, and Bruce Fenton, former executive director of the Bitcoin Foundation.

Based on conversations with institutional investors about to receive payments, “we do not believe there will be significant selling from this group,” Thorn wrote.

However, Glover, who was previously managing director of Barclays, said there was still likely to be significant selling among lenders who, after years of waiting, have the opportunity to secure huge gains.

“Some will clearly choose to take the money and run,” Glover said.

Analysts at JPMorgan Chase said the potential for heavy selling by Mt. Gox lenders creates “downside risk” in the coming month, albeit a short-lived one.

“Assuming most liquidations by Mt. Gox creditors occur in July, [this] creates a trajectory in which cryptocurrency prices come under greater pressure in July, but begin to recover from August onwards,” the analysts wrote.

There is also the likelihood that several bitcoin investors in Mt. Gox have already cashed out. In the 10 years since the exchange filed for bankruptcy, a secondary market has emerged for those wanting to settle their bankruptcy claim. Those who resisted are the true believers, Thorn said.

“Thousands of these creditors have waited 10 years for payments and have resisted aggressive and compelling claims offers during that time suggesting they want their coins back,” Thorn said. He said he expects limited selling pressure but acknowledged that if even 10% of the distributed bitcoin is sold “it will have an impact on the market.”

Certain tax consequences may impede sales.

Luke Nolan, Ethereum research associate at digital asset management firm CoinShares, said a big reason Mt. Gox’s creditors opted for in-kind repayment has to do with tax implications. And JPMorgan said in a note on Monday that people are inclined to accept their crypto outlay, “either for tax reasons or because they think liquidating now would negate potential additional price gains in the future.”

Glover said there are ways to avoid a large capital gains tax while still taking advantage of bitcoin’s massive rise in value.

“Those in jurisdictions with capital gains tax may choose to hold their positions to avoid this huge tax burden,” Glover said, “and instead use their bitcoin as collateral to lend dollars, thereby monetizing bitcoin without having to sell it.”

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