Upbit, South Koreaβs largest cryptocurrency exchange, has removed (https://upbit.com/service_center/notice?id=5829&view=share) all previously issued deposit addresses as part of its ongoing wallet maintenance. Users will need to create new addresses before making deposits. Starting December 5 at 17:00 KST, deposits and withdrawals for 33 assets across 21 networks will be restored in stages. The update comes in the aftermath of the November 27 security incident that resulted in roughly 44.5 billion KRW in losses.
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Polymarket and rival platform Kalshi are both accelerating (https://www.bloomberg.com/news/articles/2025-11-20/kalshi-and-polymarket-battle-gambling-companies-in-prediction-market-frenzy) their global and crypto-focused expansion. Polymarket is working to reopen access for users in the UAE and is reportedly pursuing a new funding round at a valuation above $12 billion. Kalshi, on the other hand, is capitalizing on its U.S. regulatory approval to strengthen its position in the compliant prediction market sector, and is presently valued at around $10 billion.
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