Bitcoin ETFs experienced a net outflow of $64 million on Monday, contrasting with gains in other crypto ETFs. Ether funds attracted $22.5 million, Hyperliquid funds $17.2 million, and XRP and Solana funds each gained about $2.8 million. This shift aligns with Monday's market performance, where altcoins outpaced Bitcoin, with XRP rising 7%, Solana 6%, and Hyperliquid 11%. Despite the outflows, Bitcoin ETFs still hold approximately $83 billion in assets, compared to $10 billion for ether and around $1 billion each for XRP, Solana, and Hyperliquid. The outflow was primarily due to Grayscale's GBTC losing $124 million, while BlackRock's IBIT, the largest Bitcoin fund, gained $66 million. The sustainability of this trend remains uncertain, depending on whether altcoin ETFs continue to attract inflows.