Key Highlights
- Bitcoin is retesting the U.S. spot ETF cost basis near $81,000, the same level that capped the May rally and absorbed last week’s downside sweep, according to Glassnode.
- A decisive daily close below this level would put mid-$70,000 prices back into play, with the True Market Mean near $77,500 as the next major support.
- The market remains boxed between roughly $80,000 to $81,500 support, formed by ETF and treasury cost bases, and $86,700 to $87,700 resistance from six-to-12-month holders.
Bitcoin is testing the aggregate cost basis of U.S. spot Bitcoin ETF holders near $81,000 again, according to on-chain data provider Glassnode. The level previously capped the May rally before a sharp decline and absorbed a downward sweep from just below last week.
In a post on Thursday, Glassnode noted that a convincing daily close below this threshold would bring mid-$70,000 levels back into consideration. Bitcoin was trading in the low $82,000s to high $81,000s range on October 22 after earlier sessions saw prices near $84,000, placing the market directly at this key institutional reference point.
What the ETF Cost Basis Represents
The ETF cost basis reflects the average price at which U.S. spot Bitcoin ETFs have accumulated their holdings through net inflows. Glassnode estimates this figure near $81,000 to $81,500. When the market trades above it, the typical ETF investor remains in unrealized profit. A sustained move below it would leave that cohort underwater, a condition that has historically weighed on flows and sentiment.
Corporate treasury companies that hold Bitcoin sit at a similar average cost of about $80,200. The October 15 dip briefly pushed prices to $80,100, testing both groups at once. Buyers stepped in, and order-book bids at $80,000 on major exchanges such as Binance were largely refilled within days.
BTC Maintain Position Above $80,000
Bitcoin spent much of 2026 below the ETF cost basis. The May advance stalled just beneath it and did not produce a sustained hourly close above the level until early September. In October, the same line has functioned as support, with multiple tests holding so far.
Last week’s sweep from below was caught near this zone. Price recovered, and U.S. spot ETFs recorded a notable $653 million inflow on October 19, the strongest single day since late September, though volumes remained relatively thin. Subsequent sessions have seen mixed flows as the market continues to consolidate.
Glassnode’s analysis shows Bitcoin boxed between roughly $80,000 and $87,000. On the downside, the True Market Mean, which is the average cost basis of active secondary-market investors, sits near $77,500 to $77,600. The short-term holder cost basis is lower still, around 74,600. A break of the ETF level would open the path toward these supports and potentially mid-$70,000 territory if selling accelerates.
Overhead Resistance from Earlier Buyers
Above current prices, coins acquired six to 12 months ago carry a cost basis near $86,700 to $87,700. This zone coincides with a concentration of sell-side liquidity on exchange order books and the largest clusters of leveraged liquidations. Holders from one to two years ago sit higher, near $99,500 to $100,000.
These top buyers have repeatedly limited upside attempts this year. Selling pressure from the six-to-12-month cohort intensified into early October rallies but has since slowed. A decisive move above the $87,000 area accompanied by renewed ETF inflows would signal that demand is absorbing the available supply.
The presence of large institutional holders has altered Bitcoin’s price behaviour. Declines toward the $80,000 to $81,500 band have increasingly attracted buyers rather than triggering broad capitulation, according to market observers citing the structural floor created by ETF and treasury ownership. At the same time, periods of net ETF outflows, such as the hundreds of millions recorded earlier in October, have tested that resilience.
Upcoming macro events, including the Federal Reserve decision later in October and potential MSCI index adjustments in November, could influence flows and volatility in the coming weeks. Profit-taking has moderated compared with levels seen at the September highs, providing some relief on the supply side.
