According to Nate Geraci, President of The ETF Store, on the X platform, BlackRock's Bitcoin exchange-traded fund iShares Bitcoin ETF (IBIT) has surpassed its gold exchange-traded fund iShares Gold ETF (IAU) in terms of asset size. This was achieved in just 10 months. The iShares Gold ETF (IAU) is a gold exchange-traded fund launched by BlackRock in January 2005.