On April 18, BlackRock IBIT's trading volume was $1.27 billion, and Grayscale GBTC's was $556 million.
On April 18, the trading volume of Bitcoin spot ETFs was as follows:
BlackRock IBIT: $1.27 billion
Grayscale GBTC: $556 million
Fidelity FBTC: $449 million
ProShares BITO: $257 million
ARKB: $148 million
BITB: $70.42 million