Combined net inflows into US spot crypto ETFs fell to $64.8 million on Monday, an approximately 80% decline from the previous Friday, after Bitcoin ETFs alone attracted $2.4 billion during the week ended September 25. The Monday total covered Bitcoin, Ether, Solana and XRP products, with reporting snapshots putting Bitcoin inflows between $31 million and $135 million, while Ether drew $87 million, Solana $86.7 million and XRP $21 million. The category figures came from different reporting sources and do not align arithmetically with the combined total. Bitcoin ETFs’ weekly performance was their strongest since October 2025, lifting year-to-date flows back into positive territory. Cumulative net inflows into US spot Bitcoin ETFs reached approximately $57.6 billion, while total net assets stood near $108 billion. The figures also highlighted diversification beyond Bitcoin, as dedicated Solana and XRP products attracted capital alongside Ether funds. BlackRock’s IBIT and Fidelity’s FBTC continued to capture the largest share of Bitcoin ETF flows during positive periods. The Monday slowdown was framed as mean reversion after an unusually strong week, with the $2.4 billion Bitcoin ETF figure roughly twice the trailing four-week average. The next month’s key measure will be whether Solana and XRP products continue drawing meaningful capital alongside Bitcoin and Ether, which would indicate a broader institutional crypto allocation trend. The source described Bitcoin ETFs as a permanent fixture in the US investment landscape.