According to @StockMKTNewz, Kalshi prediction markets are coming to Coinbase, with the update explicitly tagged to $COIN in a Dec 19, 2025 post (source: @StockMKTNewz, Dec 19, 2025 tweet). The tweet includes a link for more information but does not specify rollout timing, regulatory details, or market impact metrics (source: @StockMKTNewz, Dec 19, 2025 tweet). For trading relevance, the post highlights a Coinbase integration topic tied to the COIN ticker that headline-driven traders may track (source: @StockMKTNewz, Dec 19, 2025 tweet).