MicroStrategy founder Michael Saylor stated that ETFs have exceeded his expectations in terms of fund inflows and trading volume. This summer, the assets under management of Bitcoin ETFs will surpass gold funds. According to BitMEX statistics, since its launch on January 11th, the net inflow of spot Bitcoin ETFs has reached $8.9 billion. BlackRock's IBIT and Fidelity's FBTC are among the top 20 most actively traded exchange-traded funds on exchanges.