The Korean Crypto Laundering Method Behind $6.4 Billion, and Why Police Struggle to Stop It
A single cross-border laundering method has quietly become the backbone of South Korea's crypto crime wave, accounting for $6.4 billion of the $7.1 billion in illegal crypto transactions recorded in the country since 2021. And despite knowing exactly how it works, police are struggling to stop it.
The technique is called Hwanchigi. It exploits cryptocurrency transfers to move illicit money offshore without touching South Korea's regulated banking system, making it fast, borderless, and difficult to prosecute. A Crystal Intelligence report tied the method to the vast majority of illegal crypto flows in the country between 2021 and August 2025, and new police data suggests its use is accelerating sharply.
The Numbers Behind the Surge in Korea
National Police Agency figures show money laundering cases involving virtual assets hit 1,214 in the first half of 2026 alone, up from just eight cases in all of 2025. That 152-fold jump pushed money laundering to 79.4% of all crypto offenses detected in H1 2026, displacing investment fraud, which had accounted for 92% of crypto crime through last year.
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