According to Lookonchain, on May 21, 2025, the top 10 Bitcoin ETFs recorded a net inflow of 3,168 BTC, equivalent to $345.16 million, with BlackRock's iShares ETF contributing 2,704 BTC ($294.62 million) and now holding 638,824 BTC ($69.61 billion). Meanwhile, 9 Ethereum ETFs reported a net inflow of 25,934 ETH ($66.52 million), with iShares adding 18,162 ETH ($46.58 million). These significant inflows underline growing institutional demand and signal bullish sentiment in the crypto market, potentially impacting Bitcoin and Ethereum prices in the short term (Source: Lookonchain, Twitter, May 21, 2025).