South Korea's Retail Crypto Market Volume Drops 54% in H1 2026

South Korea’s retail crypto market is cooling fast — and liquidity is crowding into the biggest exchanges. NexBlock data show trading across the country’s five major won-based platforms — Upbit, Bithumb, Coinone, Korbit and Gopax — fell sharply in H1 2026. Combined volume for the first six months totaled roughly $366.58 billion, a 54.6% drop year‑over‑year from H1 2025. The slump continued into July. From July 1–27 the five exchanges recorded about 17.34 trillion won in cumulative trading, down 16.9% from the comparable period in June. But the pain has not been evenly distributed: liquidity has become concentrated at market leader Upbit. Key July snapshot - Upbit handled roughly 11.69 trillion won during the July period. While its volume fell about 10%, its share of the five-exchange market climbed from 62.3% to 67.4%. - Bithumb posted about 4.71 trillion won and saw its market share drop from 30.7% to 27.1%, widening the gap between Upbit and Bithumb to roughly 40.3 percentage points. - Coinone, Korbit and Gopax registered steeper declines and face pressure to rethink their business models. NexBlock attributes the shift to liquidity gravitating toward the deepest order books during a market slowdown. Large, liquid venues can execute bigger trades with less price slippage, which attracts more traders and reinforces the dominance of leaders like Upbit — leaving smaller platforms with thinner books and fewer transactions. What smaller exchanges are doing Smaller players are reportedly exploring partnerships with securities firms, rolling out institutional services, pursuing stablecoin offerings, or restructuring internally. NexBlock says future competition may hinge less on headline spot volume and more on: - stablecoin liquidity, - regulatory compliance, - institutional access, - integration with traditional financial firms. Broader implications For international investors, South Korean exchange flows are an important window into Asian retail demand. Although won-based platforms mainly serve domestic users, weaker Korean volume could dent global altcoin liquidity and price discovery — particularly for tokens that historically had strong local followings. Regulation and taxes: a new factor The volume slump comes as South Korea moves forward with a long-delayed crypto tax. Finance Minister Koo Yun-cheol confirmed on July 29 that the government will begin taxing cryptocurrency gains on Jan. 1, 2027. Koo said, “We are pushing forward with the plan to tax cryptocurrency starting next year as scheduled.” The tax framework: - Transfers or lending of virtual assets will be classified as “other income.” - Annual gains above 2.5 million won (about $1,740) will face a 20% national tax. - A local income tax will bring the combined rate to about 22%. - Traders below the 2.5 million‑won threshold will not owe tax. - The first tax returns for 2027 gains are expected in May 2028. How this will affect volumes depends on how exchanges implement transaction reporting and cost‑basis calculations before the rules take effect. State investment pivot: KIC’s domestic push Separately, the government is expanding state-backed investment inside Korea. The Korea Investment Corporation (KIC), the sovereign wealth fund, will launch a new account seeded with at least 20 trillion won (about $13.7 billion) to invest domestically in strategic sectors such as AI and data centers — a shift from KIC’s historical overseas focus. That broader push aims to channel institutional capital into domestic industries and diversify long-term returns, but it’s distinct from crypto tax and exchange policy. Outlook For exchanges the immediate challenge is clear: rebuild trading activity while meeting tighter regulatory and tax requirements. Upbit’s growing market share underscores how quickly liquidity concentration can accelerate in a downturn. Smaller platforms will likely need to lean on institutional partnerships, stablecoin services or structural changes if they want to remain competitive in a shrinking retail market. Read more about developments in South Korea’s crypto landscape and what they may mean for global liquidity and local traders.