Mixin Network Suspends Services Amid $200 Million Hack

South Korea’s cryptocurrency industry is entering a politically sensitive stretch as investors, exchanges, and regulators confront a mix of tax uncertainty, shrinking trading volumes, and growing scrutiny over crypto-linked money laundering. At the center of the debate is the government’s plan to begin taxing crypto gains in January 2027 after three previous delays. Under the current plan, annual crypto profits exceeding 2.5 million won ($1,650) would be taxed at 22%. The framework was first formalized in 2020, but implementation was postponed several times amid concerns over investor protection, market readiness, and political resistance. According to the Hankyoreh newspaper, opposition has intensified after lawmakers scrapped the country’s financial investment income tax, which would have applied to gains from stocks and funds. Critics argue that taxing crypto while most retail stock investors remain exempt from capital gains tax creates an uneven playing field.Photo by Tara Winstead on PexelsCrypto tax petition advancesA public petition calling for the abolition of crypto taxation has already gathered more than 54,000 signatures, clearing the threshold for review by a National Assembly committee. The petitioner argued that the issue needs a full reconsideration, including the possibility of scrapping the tax altogether. The opposition People Power Party has also proposed legislation to abolish the crypto tax, saying it would be inconsistent to impose a separate income tax on crypto assets after eliminating the broader financial investment tax. The ruling Democratic Party, meanwhile, is expected to take up the issue more seriously after the June 3 local elections. The government says there has been no change to its position and that crypto taxation is still scheduled to begin next January. But it has ruled out, at least for now, any renewed discussion on the financial investment income tax, fueling claims that the tax system is treating crypto investors unfairly. The tax dispute comes as Korean crypto exchanges are already grappling with a steep drop in trading activity. Retail investors have been shifting money into equities, drawn by a strong KOSPI rally and momentum in chip and AI stocks, draining activity from the crypto market. According to CoinMarketCap data cited by ETNews, Upbit’s average daily trading volume in the first quarter stood at about $1.55 billion, down 38.8% from the second half of last year. Bithumb’s first-quarter daily average was roughly $647 million, a 44.4% drop over the same period. The decline continued after the first quarter. From Jan. 1 to May 20, Upbit’s average daily volume fell to about $1.38 billion, down 45.5% from the second half of 2025. Bithumb’s average dropped to about $600 million, widening its decline to 48.5%.That slowdown has hit earnings. Dunamu, the operator of Upbit, reported first-quarter operating revenue of 234.6 billion won and operating profit of 88 billion won ($58 million), down 55% and 78% year-on-year, respectively. Bithumb posted revenue of 82.5 billion won ($55 million) and operating profit of just 2.9 billion won ($2 million), down 57.6% and 95.8%, while swinging to a net loss of 86.9 billion won ($58 million). The structural problem is that Korean exchanges still rely heavily on retail spot-trading fees. Unlike major global exchanges, domestic platforms have limited room to expand into derivatives, institutional custody, stablecoin payments, and other higher-margin businesses. Rising compliance costs, including customer verification and anti-money-laundering (AML) upgrades, are adding to the burden. USDT dominates $77M laundering caseSeparately, Korean police said they apprehended 149 suspects accused of laundering about 117 billion won ($77.5 million) through a network linked to a China-based laundering group in Shenzhen, according to the Seoul Economic Daily. Seven suspects were formally arrested, and police said all suspects identified so far are Korean nationals. USDT accounted for 72% of the funds moved, while bogus gift-card operations made up 19% and ordinary bank transfers 9%. Authorities said the scheme used accounts opened under other people’s names and overseas crypto exchanges to make the funds harder to trace. Meanwhile, sentiment among Korean crypto investors remains mixed but not entirely bearish. A weekly survey by CoinNess and Kratos found that 34.1% of respondents expected Bitcoin to rise or surge this week, while 36.3% expected sideways movement and 29.6% expected a decline. Asked whether the crypto market could recover this year, 38.5% said the current downturn looked like a healthy correction with room for a rebound, while 29.7% said the market would not only recover but also set new highs. Combined, 68.2% of respondents expected some form of recovery this year. Still, pessimism remains. Another 17.7% said the crypto market had peaked and was unlikely to rebound, while 14.1% said they had already left the market and no longer had expectations. At the time of publication, Bitcoin (BTC) was trading at $76,677.43, up 0.1% over the past week, reflecting a largely range-bound market. 

A Cambodia-headquartered financial group recently cut off from the U.S. financial system is suspected of having operated in South Korea, raising fresh questions about cross-border crypto and currency flows tied to the group. According to the Dong-A Ilbo, which cited data from the Korea Customs Service (KCS), Huione Group—now sanctioned by the U.S. Treasury Department’s Financial Crimes Enforcement Network (FinCEN)—appears to have run a currency exchange in Seoul from 2018 to July 2024. The outlet reported that a banner on the premises displayed a logo identical to Huione’s, prompting suspicions about its ownership and control.Photo by Aleksandar Pasaric on PexelsTies to North Korean hackersThe exchange reported conducting roughly $20,000 in annual currency conversions during that period, excluding cryptocurrency transactions. The timeline overlaps with a period in which Huione Group reportedly received $150,000 in cryptocurrency from the North Korean hacking group Lazarus.  Connections also extend to Cambodia. Panda Bank—a local lender that shares a building with Huione subsidiaries—supports USDT transactions originating from South Korea. Panda Bank director He Yanming is listed as the owner of Huione Crypto, a virtual asset service provider (VASP), suggesting potential links between operations in Seoul and Phnom Penh. These developments come against the backdrop of a U.S. investigation disclosed in May, in which FinCEN said Huione’s business networks, including payments arm Huione Pay, collectively laundered at least $4 billion in illicit proceeds between August 2021 and January 2025. Crypto used in $2.6B illegal conversionsMeanwhile, recent KCS data also shows a rise in illegal currency conversions involving cryptocurrency by foreign nationals. The Korea Economic Daily reported conversions totaling 432 billion won ($302 million) in 2021, climbing to 836 billion won ($584.5 million) in 2023 and 956 billion won ($668.4 million) last year. Over the past eight years, the total amount involved in such cases reached 3.7 trillion won ($2.59 billion) across 28 instances. By value, Chinese nationals accounted for 84.1% of the total, followed by Australians (11.1%), Vietnamese (3.2%), and Russians (1.6%). The growing prevalence of cryptocurrency in illicit activity parallels a broader surge in crypto investment within the country. Many South Koreans have turned to digital assets, often with home ownership as a long-term goal. Trading on local exchanges, Bloomberg reported, is heavily skewed toward more volatile altcoins, which make up more than 80% of total volume.  That stands in contrast to global markets, where investors largely focus on Bitcoin and Ethereum, which together make up more than half of overall trading. The momentum in local crypto investment intensified after Donald Trump’s U.S. presidential victory, with crypto trading in Korea reaching $27 billion in December 2024, about 80% of turnover on the KOSPI stock index. The investigation underscores the growing challenge for regulators in tracking and containing cross-border financial networks that rely on cryptocurrency and informal money transfers. As crypto adoption deepens in South Korea and scrutiny widens abroad, authorities find themselves navigating an increasingly intricate intersection of financial opportunity, enforcement, and risk. 

South Korea and Canada have agreed to strengthen cooperation against cyber threats, including North Korea’s theft of virtual assets, following their inaugural cyber policy consultations.Photo by Hermes Rivera on UnsplashAccording to News1, South Korea’s foreign ministry announced that the talks took place at its Seoul headquarters. Both sides agreed on the need for closer coordination to effectively counter cybercrimes—such as North Korea-linked crypto theft and online scams—as well as emerging cyber threats driven by artificial intelligence. They also committed to exploring concrete avenues for bilateral cooperation. The delegations exchanged views on response mechanisms for the recent surge in cyber intrusions, sharing case studies on how such incidents have been handled. They also agreed to strengthen prevention efforts by improving information sharing and speeding up communication across multiple channels when incidents occur. The foreign ministry noted that the meeting marks a significant step toward enhanced cybersecurity cooperation, as the two nations share policy approaches and explore practical collaboration under their comprehensive strategic partnership. Bithumb staff form labor unionMeanwhile, employees in the crypto sector are beginning to organize to safeguard their rights. An exclusive report by NewsWhoPlus revealed that a labor union has been established at Bithumb, one of South Korea’s major crypto exchanges. The union has affiliated with the Federation of Korean Public Trade Unions, which operates under the umbrella of the Federation of Korean Trade Unions. The union stated it will serve as a forum to discuss and improve employee welfare and working conditions. In response, Bithumb said it is reviewing reports of the union’s formation to gather more details. The company emphasized its respect for employees’ rights and affirmed it will respond in accordance with relevant laws and procedures. Industry readies for stablecoin oversightElsewhere in the industry, companies are proactively positioning themselves for regulatory shifts. As South Korea’s Digital Asset Basic Act—the second phase of the country’s crypto legislation, which is expected to address assets like stablecoins—begins to take shape, businesses are moving early to prepare for the anticipated changes. Edaily reported that Lambda256, an affiliate of Upbit operator Dunamu, is forming a strategic consultative group focused on stablecoins. To this end, the company has signed a tripartite memorandum of understanding (MOU) with the law firm Yulchon and SAS Korea. Under the agreement, the partners will combine their expertise in blockchain technology, legal services, and data analytics. They aim to establish a joint framework to navigate key legal and regulatory issues surrounding stablecoins and other digital assets. This cooperation will encompass anti-money laundering (AML) protocols, financial crime prevention, internal controls, risk management, and the legal structuring of related product offerings. On the financial and regulatory front, the partners plan to refine practical AML compliance and internal control measures for financial institutions. By continuously analyzing shifts in digital asset regulations and broader market trends, they intend to develop practical compliance frameworks that financial firms and other businesses can readily adopt.