According to CoinMarketCap, cumulative trading volume across US spot crypto ETFs reached $2 trillion on Jan. 2, achieving the milestone in half the time it took to cross $1 trillion (source: CoinMarketCap on X, Jan 5, 2026). According to CoinMarketCap, the update attributes this faster growth to accelerating institutional demand, underscoring rising participation in US-listed spot crypto ETFs that is relevant for liquidity and execution (source: CoinMarketCap on X, Jan 5, 2026).