Bitcoin spot in the United States and ether Exchange-traded funds lost a total of $582 million in net outflows on Monday, the largest amount since November 20, as crypto markets fell, sending bitcoin down to $85,100.
Bitcoin ETFs saw $357.6 million in outflows, the most in nearly two weeks, while ether ETFs saw $224.8 million outflows in a third day of withdrawals, according to Farside data.
According to Velo data, Monday is the third worst-performing weekday for Bitcoin over the past 12 months, behind Thursday and Friday in terms of average returns. Throughout 2025, several of Bitcoin’s major local lows occurred on Mondays, a trend highlighted in the chart below.
A key level to watch for potential Bitcoin support is the cost basis of US ETFs. This metric represents the average entry price of bitcoin held by spot ETFs and is calculated by combining daily ETF entries with the price of bitcoin at the time of each deposit to form a moving average.
According to Glassnode data, the overall cost of US Bitcoin ETFs currently stands at almost $83,000, a level from which Bitcoin rebounded during previous lows on November 21 and December 1.
Among BTC ETFs, the Fidelity Wise Origin Bitcoin Fund (FBTC) suffered $230.1 million in redemptions. Bitwise Bitcoin ETF (BITB) and ARK 21Shares Bitcoin ETF (ARKB) saw notable outflows of $44.3 million and $34.3 million, respectively. BlackRock’s iShares Bitcoin Trust (IBIT) reported no net flows that day, according to Farside data.
In contrast, the iShares Ethereum Trust (ETHA) accounted for the majority of ETH ETF redemptions, at $139.1 million.
