Coinbase has emerged as a dominant player in the U.S. cryptocurrency exchange-traded fund (ETF) market, reportedly holding over 80% of the Bitcoin and Ethereum ETF assets in the country. The platform experienced a significant peak in 2025, with $31 billion in inflows from these ETFs. This development underscores Coinbase's pivotal role in the growing institutional adoption of cryptocurrency ETFs, as investors increasingly seek exposure to digital assets through regulated financial products. The substantial inflows highlight the rising demand for Bitcoin and Ethereum among institutional investors.