South Korea has intensified its crackdown on users of decentralized prediction markets, specifically targeting the Polymarket platform. Local authorities have opened criminal cases against 26 South Korean bettors for participating in illegal gambling. To date, 18 of these cases have been forwarded to the prosecutor's office, signaling a firm commitment to prosecuting these practices. In total, investigators have identified approximately $12.7 million in wagers, with a significant $4.1 million portion attributed to a single individual.
The success of South Korean authorities in this investigation relies on the transparent nature of the blockchain rather than cooperation from the platform itself. Although the site is officially blocked by the national regulator, users have bypassed these restrictions. Law enforcement agencies cross-referenced public transaction ledgers on the Polygon network with open-source intelligence (OSINT) techniques. Once a crypto wallet interacts with a local exchange subject to Know Your Customer (KYC) procedures, the link between the public address and the user's civil identity becomes traceable.
The Korean legislative framework is particularly strict, treating almost all forms of non-state betting as criminal activity. The penal code provides for sanctions ranging from heavy fines to prison sentences of up to three years for habitual gamblers. This law applies to Korean citizens regardless of whether the transactions are carried out from within the country or via foreign platforms. These prosecutions illustrate a global regulatory inconsistency: while Polymarket attracts massive investment in the United States under the supervision of federal authorities, the same service is treated as an underground casino operation in Seoul.
This situation highlights the inherent risks of using decentralized financial tools in jurisdictions with restrictive policies. While anonymity is theoretically possible on the blockchain, the interconnection between digital assets and the traditional banking system provides regulators with powerful levers to identify users. As the cases move through the courts, the severity of the penalties imposed will serve as a test for South Korean jurisprudence regarding the rise of decentralized prediction platforms in a country where the appetite for digital assets remains among the highest in the world.