The introduction of Bitcoin spot ETF products has led to a surge in open interest, with over $21 billion now invested. In just one month, $4.1 billion has flowed into these products. Grayscale's GBTC has experienced significant outflows, while Blackrock and Fidelity are leading in YTD inflows. ETFs have absorbed a substantial amount of Bitcoin, with $13.5 billion secured by new ETFs. Grayscale continues to see a slowdown in outflows from its Bitcoin spot ETF. Coinbase's Bitcoin supply has dropped to its lowest level since 2015, with a significant withdrawal. Blackrock and Fidelity's spot Bitcoin ETFs are among the top US ETFs by inflows this year.