KuCoin's 24-hour top gainers show solid momentum across the altcoin space as of December 18, 2025. Leading the charge is Infrared Finance (IR), surging an impressive 255% to hit $0.17—a significant breakout move that caught the attention of momentum traders. PlayAI Network (PLAI) follows closely behind with a 114% jump to $0.0042, reflecting growing interest in AI-focused tokens.

Mid-tier gains came through solid performers: t3rn (TRN) advanced 50% to $0.0078, while Milky Way Zone (MILK) climbed 48% to $0.0085. Rounding out the top five was Humanity Protocol (H), posting a respectable 41% gain at $0.097.

These moves highlight how quickly momentum can shift in the altcoin market, with smaller-cap tokens delivering outsized returns during favorable market conditions. Traders monitoring KuCoin's exchange data continue to identify emerging opportunities through real-time performance tracking.