Bitcoin ETFs now hold 6% of total Bitcoin market cap

US spot Bitcoin ETFs now manage roughly $102.5 billion in assets, holding approximately 6.29% of Bitcoin’s entire supply. That’s around 1.27 to 1.32 million BTC sitting in cold storage, effectively pulled from active circulation since these products launched in January 2024.

BlackRock is eating the competition alive

BlackRock’s iShares Bitcoin Trust, known by its ticker IBIT, holds an estimated 693,000 to 786,000 BTC. That gives it a commanding share of the total ETF market, often exceeding 60% of all Bitcoin ETF assets.

IBIT has pulled in more than $60 billion in cumulative inflows since launch. Fidelity and Grayscale have struggled with net outflows during various periods. Grayscale’s converted GBTC product shed significant holdings as investors rotated into lower-fee alternatives. The cumulative net inflows across all US spot Bitcoin ETFs sit at approximately $55 billion, which means BlackRock alone accounts for a disproportionate chunk of the total capital that’s actually stuck around.

The supply squeeze no one can ignore

Bitcoin has a hard cap of 21 million coins. Bitcoin held by ETFs doesn’t get lent out, staked, or traded on exchanges. It just sits there, backing the shares that investors buy and sell on traditional stock markets. Every BTC that enters an ETF’s custody is one fewer BTC available for spot market transactions.