South Korea's licensed crypto exchanges are suffering a dual exodus of traders and capital, a joint probe by the Korea Financial Intelligence Unit (KoFIU) and the Financial Supervisory Service (FSS) has revealed.

The core crisis lies in a sharp decline in the appeal of the domestic market, triggering a large-scale shift of capital abroad. Regulatory data covering 26 licensed virtual asset service providers between January and June showed the combined market capitalization of South Korean exchanges fell 33%, wiping out 28.3 trillion won; won-denominated deposits slid 35%, a drop of 2.9 trillion won; and average daily trading volume also fell 44%.

By the end of June, the total market value of South Korean exchanges had dropped to about 58.9 trillion won (roughly US$42 billion), down from 87.2 trillion won six months earlier. Daily turnover fell from 5.4 trillion won to 3.1 trillion won, while customer won deposits declined from 8.1 trillion won to 5.2 trillion won. Exchange operating revenue plunged 78% year on year, from 374.8 billion won to 81.6 billion won.

Regulators attributed most of the decline to Bitcoin, with the FSS noting that Bitcoin fell 33% to US$58,559 as of the end of June. The investigation also found that of 234 tokens listed on only a single exchange, 93 had an assessed value of less than 100 million won, a figure regulators said should make users think twice.

This deterioration in asset quality and the drying up of liquidity formed a vicious cycle that further eroded the foundations of the domestic market, according to data compiled by Woofun AI.

Another deeper reason for the deposit decline is that overseas platforms are luring South Korean traders with high-risk products not permitted in the domestic market. One example is perpetual futures contracts based on KORU (KORU.US), a US-listed ETF whose daily price swings are three times the single-day move of South Korea's Kospi index. Binance listed the KORU product on June 22 with 20x leverage, then raised the cap to 50x four days later. Because the fund itself already tracks three times the index's single-day move, traders could end up with exposure of as much as 150x. Earlier in June, Binance also launched 20x products tied to Samsung Electronics, SK hynix and Hyundai Motor, while Bybit, OKX and KuCoin rolled out their own KORU contracts. On June 23, the Kospi fell 9.99% and KORU plunged 35.7% in a single day to US$700.01.

These platforms sit outside South Korea's investor protection system, and the path traders take is to buy Tether with won on a licensed local exchange, then move the stablecoin offshore. Tiger Research, working with blockchain analytics firm Chainalysis, tracked about 120,000 Korea-related wallets and estimated that roughly 700 trillion won (about US$530 billion) flowed out of South Korean exchanges between 2021 and 2026. The outflows were about US$120 billion in 2025 and are expected to approach US$52 billion this year. From January 2024 to July 2026, wallets held by South Koreans put about US$1.64 billion into three decentralized derivatives platforms: Hyperliquid, Lighter and Variational. In July alone, about 1,200 of those wallets completed US$4.97 billion in notional trading volume on Hyperliquid. Their most-traded instruments included contracts linked to SK Hynix, Samsung Electronics and crude oil, which can be leveraged and traded around the clock even when regular markets are closed.

Shinhan Securities analyst Park Sung-jae said in July that domestic South Korean trading volume had fallen to about 1.6% of Kospi turnover at the time, and that investors were leaving because overseas crypto exchanges offered diversified investment methods. These exchanges provide futures and leverage, whereas in South Korea spot trading is "effectively the only trading option available," he noted.

A more critical variable is the political battle triggered by the new tax policy. South Korea plans to impose a 22% tax starting Jan. 1, 2027, on annual crypto gains above a 2.5 million won deduction, with the first filing due in May 2028. Petitioners warned the rule would push more traders overseas and have gathered the 50,000 signatures needed to force legislative review. Lawmakers from both the ruling and opposition parties have proposed measures that could delay it to 2030. South Korea's finance minister, Lee Hyoung-il, supports the tax, arguing that 85% of investors hold crypto assets worth less than 5 million won and thus would not be much affected even after the deduction. After regulatory arbitrage, policy uncertainty has once again become a core driver of capital flight.