Karla Barker 
Bitcoin and Ethereum extended their weekend rebound, but the move is running into areas where past buyers might decide to sell. The market bounced after a rough stretch, yet the recovery still looks fragile.
Bitcoin approaches a key cost basis cluster
Bitcoin briefly climbed above $84,000 after dipping toward $80,000 during last week’s selloff. Ethereum also pushed back above $2,500, recovering part of its recent losses as buying activity returned.
The trouble for Bitcoin is the area just ahead. Data from CryptoQuant analyst J.A. Maartunn showed a liquidity cluster formed above the market price on Oct. 11. Traders placed a thick wall of buy orders beneath the market, which helped support the push higher. The spot Bid/Ask Ratio, which tracks buying and selling liquidity within 1% of the current price, rose to 0.3. That suggests visible buying interest strengthened compared with sell orders. But those orders can vanish if traders cancel them.
More important, Checkonchain data highlighted by analyst Darkfost showed that around 53% of Bitcoin’s invested capital had an estimated acquisition price above $83,000 when the asset traded near that level. The biggest concentration of acquisition costs sits between $84,000 and $85,000. Investors who bought in that range may be quicker to sell as price returns to their cost basis, adding supply that buyers must absorb.
If Bitcoin can move through that zone and hold, it would signal demand is strong enough to take on the selling pressure. If not, another drop is possible. Darkfost pointed to $77,000 to $79,000 as a support area to watch.
Ethereum derivatives show cautious positioning
Ethereum’s rebound has its own problem. Alphractal CEO Joao Wedson noted on Oct. 10 that Ethereum’s 30-day and 180-day open-interest deltas were negative. The Whale vs. Retail Delta indicator also weakened. He read the mix as major traders reducing bullish exposure and leaning more defensive or short.
Negative open-interest readings mean outstanding derivatives positions have shrunk over those periods. Still, Ethereum’s total futures open interest remained large at about 10.58 million ETH. At $2,500 per ETH, that is roughly $26.5 billion in notional exposure.
That leaves a market with less bullish conviction but plenty of borrowed exposure still in play. If volatility returns, sharp moves are possible. A fresh decline could push long positions using borrowed funds toward forced liquidation, which may add selling pressure and speed up losses. On the other side, a sustained recovery could force short sellers to close, adding upward momentum. Wedson warned that Ethereum’s derivatives market remains vulnerable to more liquidations even after the recent reduction in positions.
What to watch next
For now, Bitcoin’s $84,000 to $85,000 band is the immediate test. Ethereum’s $2,500 level matters, but derivatives positioning may matter more. The bounce is real, though it has not cleared the obstacles that could stop it.