South Korea’s Digital Asset Exchange Alliance (DAXA) has rolled out a new compliance standard requiring local crypto exchanges to revoke API keys suspected of being shared or misused. The move comes as the Financial Supervisory Service says automated trading represents about 30% of domestic crypto turnover, prompting tighter monitoring steps such as IP whitelisting and mandatory re-authentication.

On May 28, Samsung Securities, Samsung SDS, and Samsung Card said they will jointly buy a 4% stake in Dunamu, the operator of South Korea's largest crypto exchange Upbit, for about 612.8 billion won ($408 million). The shares are being acquired from Kakao-affiliated funds at around 439,250 won per share, implying a Dunamu valuation of roughly 15.3 trillion won, with closing scheduled for June 19.

Bitcoin fell more than 3.5% intraday and briefly dipped under $73,000 amid broader weakness across major cryptocurrencies. Derivatives markets saw liquidations exceed $1 billion over 24 hours, while most large-cap altcoins dropped roughly 3%–4% and several fell more than 6%. Stellar (XLM) moved against the trend, rising about 19% at the time of writing.

Bybit said transfers to or from blockchain addresses associated with HTX may face enhanced reviews and could be restricted until users submit supporting information. The notice follows U.K. sanctions this week against the Panama-incorporated entity linked to Huobi Global, amid allegations of Russia-connected sanctions-evasion flows.

On May 28, crypto prices moved lower as Bitcoin briefly dipped under $73,000, alongside declines in Ethereum, Solana, XRP and other majors. The sell-off came with $936 million in 24-hour liquidations and BlackRock's IBIT logging a record $527.8 million single-day outflow. Markets also reacted to heightened Trump-Iran headlines and positioning ahead of $7.5 billion in options expiry.

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The stablecoin market is estimated at about $318B-$322B, a scale described as larger than the official FX reserves of 95 countries. Hyperliquid L1 holds $6.79B in stablecoins, including $1.04B added over seven days, with USDC representing 95.3% of supply. Total tokenized asset value is cited at roughly $350.6B, led by stablecoins at $308.6B alongside tokenized funds ($32.9B), commodities ($7.4B), and stocks (over $1.7B).