Bitcoin functions as a systemic anchor and market factor. Its circulating supply stands at approximately 19.95–20.08 million BTC. US spot ETFs hold aggregate assets of around 1.3 million BTC, representing about 6–6.5% of the float, with cumulative net inflows of roughly $52 billion despite outflows in 2026.
The ETF channel has replaced the “miner overhang” as a short-term equilibrium variable. A reduced-form flow equilibrium is expressed as: DP_t = (1/λ_t) · (F_ETF_t + F_corp_t – S_miner_t – S_LTH_t – S_perp_t), where λ_t is the Kyle depth of spot plus ETF primary market.
In August, a short squeeze fueled a ~26% rally from mid-August lows, supported by Glassnode‘s report of the strongest ETF creation week of the year and multi-cohort accumulation. However, this does not signal a new cycle bull market; the Glassnode cycle composite only moved from the “cold” band to ~40 (neutral) after seven months below.
On-chain metrics are useful but not oracular. The MVRV ratio (Market Cap / Realized Cap) touched ~1.1 in mid-year, near aggregate break-even, typical of late bear phases or mid-cycle resets, not tops (historical MVRV-Z tops > 3). The short-term holder (STH) cost basis oscillated between $68k–$73k, while the current spot price of ~$78.5k puts the STH cohort in slight profit (7-day STH-SOPR ~1.03 at end of August). This signals potential selling pressure, not completed distribution. Binance reserves rose to ~685k BTC at end of August, indicating potential supply, not an active sell order.
Global exchange reserves remain lower than 2022 levels (~2.7–3.0 million BTC), consistent with ETF custody. A supply wall is identified at $81k–$86k (ETF average cost, realized price shelves, and gamma dealer flips). Empirical support levels are $77k, $70k (50-day EMA), and $62k–$65k (summer floor). Derivatives and microstructure show high futures open interest (end of August: ~$54.8B / ~695k BTC). Options max pain for September is concentrated at $70k–$73k, acting as a bearish magnet if spot stagnates.
