Glassnode said Bitcoin swept to about $80K on Oct. 15, with ETF and treasury bids refilling and overhead supply clustered near $85K-$87.5K.

Bitcoin was swept down to about $80,000 on October 15, then found buyers quickly at a level that sits just under the average cost basis of U.S. spot ETF holders and corporate treasuries, according to Glassnode’s week-on-chain report published October 21, 2026. The move matters because the same zone has now acted as both support and a test of demand, while heavier supply remains above the market.

Glassnode said the deepest dip on October 15 reached an hourly close of $80.1K before the next hourly close recovered back above the U.S. spot ETF cost basis. The firm described that line as the average price the ETFs paid for the coins they hold. It added that treasury companies tracked in the report hold Bitcoin at an estimated average cost of about $80.2K, derived from holdings and unrealized profit. Both cost bases sit between about $80K and $81.5K, making the October 15 sweep a test of two of the largest holder groups at once.

The report said bids on the Binance spot book that had been concentrated at $80K were largely taken out in the sweep, but had refilled by October 20, though at a smaller size than at their peak. 5K, while liquidation clusters have shifted higher as well, with the two largest bands near $85K and $87K. Glassnode said a move toward $87K could accelerate if short positions are forced to close, but that same area also coincides with visible supply on the order book.

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