Fat Finger Alpha: Bithumb ‘2,000 BTC’ Error Triggers Flash Crash to $55K

A critical operational error at South Korean exchange Bithumb sent Bitcoin tumbling to 81.1 million won (approx. $55,000) on the platform today, creating a massive liquidity dislocation while global markets hovered near $62,500.

The $133 Million Typo

The catalyst was a textbook "fat finger" incident. According to CoinDesk and local reports, an employee managing a promotional event intended to distribute 2,000 Korean won (roughly $1.50) to eligible users. Instead, they inputted the reward unit as "BTC."

The result was the instant distribution of approximately 2,000 BTC, valued at $133 million, to hundreds of unsuspecting accounts. Unlike on-chain transactions, these were internal ledger credits, creating "phantom" Bitcoin that users immediately rushed to dump into the KRW order book.

Arbitrage and Aftermath

The sudden supply shock overwhelmed Bithumb's liquidity. Bitcoin's price on the exchange collapsed 15.8% within minutes, hitting a low of ~$55,000 while the global average remained steady above $62,000. This created a severe arbitrage window, though likely inaccessible to external traders due to South Korea's "Kimchi Premium" capital controls and the speed of the crash.

"The Bitcoin price temporarily fluctuated sharply as some accounts that received the Bitcoin sold it… the market price returned to normal levels within 5 minutes.", Bithumb Statement

Bithumb froze withdrawals and restricted the affected accounts shortly after the anomaly was flagged by internal monitoring systems. While the exchange claims prices stabilized quickly, the incident forces a difficult conversation about the fragility of internal exchange ledgers where a UI toggle can print $133 million out of thin air.

The exchange has not yet confirmed if trades executed during the crash will be rolled back, leaving opportunistic buyers who caught the $55k wick in limbo.

> ABOUT_THE_AUTHOR _

Mark Zimmerman

// Technical Writer

Hi, I'm Mark. My journey into the blockchain industry began on the investment side, where I worked as a developer in charge of DeFi operations for a digital asset-focused firm, eventually becoming a partner. I transitioned from the financial side of crypto to the deep technical trenches as a Solidity developer, a central limit order book built on the Avalanche blockchain. That hands-on experience building decentralized applications gave me a rigorous understanding of the challenges developers face when working with distributed ledger technology. Currently, I work as a Technical Writer at CoinWatchDaily, where I focus on bridging the gap between complex low-level code and accessible developer education.

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