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#BTC87KCryptoCap3T BTC above $87K is exciting, but the flow behind the move caught my attention more 👀 US spot BTC ETFs pulled in roughly $999M on Sep 21, the strongest daily inflow of 2026, with IBIT, ARKB and FBTC contributing about 91%. ETF assets also climbed back above $100B. At the same time, shorts accounted for around 80% of liquidations at multiple points. So this rally has two engines working together: fresh spot demand and forced buying from traders caught on the wrong side. Here’s where it gets interesting. BTC and ETH options expire Sep 25, with BTC calls clustered around $90K and $100K. That puts two psychologically important levels right above spot while positioning is already stretched. For me, $87K isn't the real test. What happens after the shorts are cleared and options expire matters more. If ETF money keeps arriving after those mechanical tailwinds fade, this starts looking much more like sustained demand than a squeeze-driven breakout.