According to @AggrNews, South Korea suspects North Korea hacked crypto exchange Upbit, as reported by Yonhap (source: Yonhap via @AggrNews). Traders should monitor official notices on deposits and withdrawals from Upbit, abnormal exchange wallet flows, and KRW pair spreads for stress signals following this headline (source: Yonhap via @AggrNews). Risk controls such as tighter position sizing on Upbit-exposed assets and caution on cross-venue arbitrage involving KRW pairs are prudent until authorities or the exchange issue clarifications (source: Yonhap via @AggrNews).