According to CoinMarketCap, crypto ETFs recorded a net $423 million inflow on December 30 after nearly two weeks of outflows (source: CoinMarketCap on X, Dec 31, 2025). CoinMarketCap reported that BTC-linked ETFs took in about $355 million while ETH-linked ETFs added roughly $68 million on the day (source: CoinMarketCap on X, Dec 31, 2025). Based on CoinMarketCap’s figures, BTC captured approximately 84% of the net inflow and ETH around 16%, indicating the day’s ETF demand was concentrated in BTC products (source: CoinMarketCap on X, Dec 31, 2025).