XRP and SOL exchange-traded funds (ETFs) experienced significant inflows on December 18, 2025, with XRP ETFs receiving $30.41 million and SOL ETFs attracting $13.2 million. In contrast, Bitcoin and Ethereum ETFs saw substantial outflows, with $161.3 million and $96.6 million withdrawn, respectively. This capital shift suggests growing investor interest in altcoins, driven by XRP's legal clarity and Solana's expanding ecosystem.