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South Korea's Financial Supervisory Service launched an investigation into Bithumb after the exchange mistakenly credited $43 billion worth of Bitcoin to user accounts. Cointelegraph reports the incident occurred during a promotional event on February 6, 2025. The exchange intended to distribute 2,000 Korean won ($1.40) to participants. An employee incorrectly entered "BTC" instead of "won" as the currency unit.

The error resulted in 620,000 Bitcoin being credited to 249 customer accounts on Bithumb's internal ledger. The exchange does not possess this quantity of Bitcoin. Bithumb's total reserves stand at approximately 43,000 Bitcoin. According to Decrypt, the miscredited Bitcoin existed only in virtual form within Bithumb's systems.

The phantom credits triggered immediate market disruption on the platform. Bitcoin's price on Bithumb dropped to $55,000 during the incident. Bithumb restricted trading and withdrawals for 695 affected customers within 35 minutes. The exchange recovered 99.7% of the miscredited Bitcoin. About 125 Bitcoin worth $8.6 million remains unsettled. Some users withdrew approximately 3,875 Bitcoin during the brief window.

The Financial Supervisory Service characterized the incident as revealing structural problems in exchange ledger systems. Governor Lee Chan-jin convened an emergency response meeting on January 7. Regulators dispatched officers to Bithumb's offices to collect incident reports. The probe examines mismatches between crypto held in wallets and amounts credited to user accounts.

Authorities identified deficiencies in Bithumb's internal controls. A single staff member was responsible for the incorrect Bitcoin crediting. The error stemmed from a single point of failure. The FSS plans to strengthen supervision by introducing punitive fines for IT incidents. New measures will include on-site inspections for companies failing to address vulnerabilities.

Bithumb CEO Lee Jae-won announced compensation plans on February 9. Users connected to the platform during the incident receive 20,000 won ($13.73). Customers who sold Bitcoin at depressed prices receive 100% of the selling price plus 10% consolation money. The exchange waived trading fees across all markets for seven days. The Korea Fair Trade Commission launched a separate investigation into Bithumb's promotional practices.

The incident intensified concerns about paper Bitcoin and operational risks at centralized exchanges. Paper Bitcoin refers to Bitcoin that does not exist on the blockchain but appears in exchange ledgers or financial products. CryptoQuant analyst Maartunn told Cointelegraph the 620,000 Bitcoin were not real and existed purely in virtual form.

Centralized exchanges face mounting security and operational challenges in 2025. TokenMetrics reports over $2.47 billion was stolen from cryptocurrency services in the first half of 2025. This figure already surpasses total losses from 2024. Unencrypted user data accounted for 17% of crypto data breaches in 2025.

The concentration of assets on centralized platforms creates systemic vulnerabilities. When exchanges aggregate user holdings, single points of failure can trigger cascading effects across financial networks. Ethereum held on centralized platforms dropped to historic lows in March 2025. Only 8.97 million ETH remained on exchanges. This represents levels not seen since November 2015.

Governments worldwide continue exploring Bitcoin as a reserve asset despite operational concerns. As we previously documented, 100 countries have considered or implemented Bitcoin reserve strategies. The United States established a Strategic Bitcoin Reserve through executive order in March 2025. El Salvador maintains public holdings exceeding 7,500 Bitcoin as of December 2025.

The Bithumb case demonstrates risks inherent in ledger-based trading systems. Exchanges rely on internal accounting where user balances update instantly. Assets move on the blockchain only during withdrawals. This structure allows phantom credits to appear before verification against actual holdings. Industry officials warn recipients refusing to return miscredited Bitcoin could face legal action. The incident arrives as Bithumb pursues plans to become the first Korean exchange listed in the United States.