US-listed spot Bitcoin exchange-traded funds have generated more than $1 trillion in combined trading volume less than 18 months after the products debuted, according to data cited on June 23. The milestone underscores sustained demand for direct Bitcoin exposure through regulated equity-market vehicles. The rapid accumulation of volume suggests that both retail and institutional investors continue to embrace the funds as a primary channel for cryptocurrency trading, bolstering expectations that Bitcoin-linked financial instruments are moving further into the mainstream.