South Korea's domestic cryptocurrency trading activity has experienced a dramatic decline, with total trading volume across major exchanges reaching only 8% of KOSPI trading volume in May 2026. According to Digital Asset data through May 26, this represents a significant drop from the previous year's performance. The won-based crypto market's trading volume fell 71% between August 2025 and May 2026, while KOSPI trading volume rose 243% over the same period, as reported by Digital Asset. The figure marks a major decline from December 2024, when crypto trading volume briefly exceeded stock market activity following the post-election crypto rally in the United States. As per PANews, this contrasts sharply with August 2025, when virtual asset trading volume was 99% of KOSPI levels, with both markets showing almost equal trading volumes.
The current decline marks a sharp reversal from December 2024, when crypto trading volume reached 323% of KOSPI volume following a strong digital asset rally linked to Donald Trump's U.S. election win. At that time, Trump had stated his intention to "make the United States the capital of digital assets," helping fuel risk appetite across the market. However, this momentum did not sustain in South Korea, with the gap widening after the crypto market decline in October 2025 while South Korean stocks continued pushing toward record levels. Markets are now watching whether weaker retail participation signals a longer-term cooling in South Korea's once-dominant crypto trading environment. According to PANews, the virtual asset market plummeted in September and October 2025 due to a large-scale futures liquidation event, while the KOSPI continued reaching new highs driven by the semiconductor boom and government stock market stimulus policies.
South Korea's crypto weakness is evident in the Bitcoin Korea Premium, which has remained negative for several recent sessions according to CryptoQuant data cited by Digital Asset. A negative premium indicates Bitcoin trades cheaper on South Korean exchanges than on overseas venues, typically pointing to weaker local buying pressure compared with global markets. The indicator turned negative in March, briefly moved positive in April, and then returned to negative territory, showing local demand has not fully recovered despite activity in global crypto markets. The Bitcoin Korea Premium Index has remained negative since March, indicating that Bitcoin prices in the country are lower than overseas, and market buying is weak. This content is for market information only and is not investment advice.
The cryptocurrency slowdown coincides with South Korea's preparation of stricter rules for crypto investors and exchanges. The country plans to tax virtual asset gains above 2.5 million won from January 1, 2027, with a combined 22% tax rate. The National Tax Service is preparing guidance with major exchanges including Upbit, Bithumb, Coinone, Korbit, and Gopax, with the first full filing period expected in May 2028 for income earned in 2027. Additionally, South Korea has moved toward tighter overseas transfer checks, with planned rules potentially increasing reporting around transfers involving foreign exchanges and private wallets.
