According to TechFlow, data shows that the trading volume of Bitcoin spot ETFs on April 15 is as follows: BlackRock IBIT $1.65 billion, Grayscale GBTC $774 million, Fidelity FBTC $569 million, ARK 21Shares' ARKB $173 million, Bitwise BITB $72.36 million. Data source: Alessandro Ottaviani