Bitcoin's perpetual funding rate has risen from around 3% to 10% since September 30, as open interest increased by 27,000 BTC to approximately 653,000 BTC, or $56.2 billion, per CoinGlass.Bitcoin climbed from around $83,500 to $86,500 over the same period.The Cost of Holding Longs Has TripledFunding is a periodic payment exchanged between traders holding long and short positions, designed to keep perpetual futures prices close to spot. When funding is positive, longs pay shorts.At 10%, traders are paying more than three times what they were two days ago to maintain bullish exposure.That cuts two ways. Willingness to pay signals conviction, and a market where longs accept rising costs is one where demand for upside exposure exceeds the supply of counterparties.It also compounds the risk. Each funding period drains capital from leveraged longs, and positions that are expensive to hold are more likely to be closed on an adverse move — which is the mechanism that turns a pullback into a cascade.The Rebound Starts From a Low BaseOpen interest at about 625,000 BTC on September 30 was near its lowest level in 12 months.The 4.3% increase since is a recovery toward normal rather than an expansion into excess. For comparison, open interest averaged roughly 750,000 BTC from April to July, and market-wide perpetual open interest reached nearly $160 billion on September 22 — the highest since late October 2025.That matters for reading the funding figure. Elevated funding on thin open interest describes a smaller group of traders paying more, not a broad leveraged build.Rising Price With Rising Open InterestPrice and open interest moving up together indicates new positions rather than short covering.The distinction has been relevant through September. The move from $74,887 on September 15 to $87,300 on September 21 leaned heavily on forced buying, with $844 million of shorts liquidated in a single day and hourly liquidations peaking above $300 million before collapsing to under $11 million once the shorts were cleared.New positions supporting a rally is a different mechanism from shorts being closed out of one.Flow data remains the weak point. CryptoQuant estimated Bitcoin's spot demand shrank by about 170,000 BTC over the 30 days to September 29, and US spot Bitcoin ETFs recorded roughly $149 million of outflows on Wednesday, snapping a nine-day streak that had attracted about $3.1 billion.Crypto Equities Moved With ItStrategy, the largest corporate holder of Bitcoin, and Strive each rose around 3% in Friday premarket trading. Coinbase and Robinhood gained approximately 2%.Those moves track Bitcoin rather than leading it, though the equity response is larger than the underlying percentage gain — the usual pattern for leveraged proxies.The Jobs Report Is the TestNon-farm payrolls arrive Friday with economists expecting 90,000 jobs added and unemployment holding at 4.1%.Kalshi prices nearly 60% odds of a figure above 90,000, while Goldman Sachs forecasts 80,000 and Bank of America 60,000. ADP reported private payrolls rising 90,000 on Wednesday against 70,000 expected.October Fed hike odds have fallen to 30% from 70% earlier this week, after New York Fed President John Williams downplayed urgency, August PCE came in softer than forecast, and Vice Chair Philip Jefferson said the committee may need more time.A print at either end of the forecast range would move rate expectations, and leveraged positions paying 10% funding are the ones most exposed to that move.