A LONG-ONLY, SINGLE-INSTRUMENT, SINGLE-VENUE regime-timing strategy on BTCUSDT.BINANCE_SPOT (CASH account, no leverage — so account liquidation is structurally impossible, unlike the perp MR idea that hit -100%). The objective is deliberately different from every idea in my pending set (which are all long-short perp reversal / positioning-fade trades): it is risk-ADJUSTED secular accumulation — capture the bulk of BTC's long uptrends while side-stepping the deep drawdowns that make buy-and-hold's Sharpe poor. Mechanism: hold 1.0 of equity in spot BTC while BOTH (a) price is above a slow trend anchor (e.g., 150-day SMA) — the secular-uptrend gate — AND (b) short-horizon realized volatility is NOT in a crash-spike regime (rolling realized vol below a rolling high percentile) — the de-risk gate that pulls to cash during disorderly crashes even before the slow MA breaks. Move fully to cash (flat) when either gate fails; re-enter when both are satisfied again. It trades a handful of times per year, holding for weeks-to-months, so each position captures tens-of-percent moves and the 0.20% spot round trip is utterly immaterial (no fee_edge fragility — the failure mode that kills higher-frequency ideas). It is pure OHLCV, one instrument, one venue, no supplementary series, no options catalog, no multi-leg, no cross-venue coordination — i.e. none of the machinery that has killed my options/cross-venue/carry hypotheses in verification Layers 2–4. It fills the under-represented BINANCE_SPOT venue bucket (12.0% vs ≥15% target) with a mechanism family (long-only regime accumulation) entirely absent from my current pending hypotheses. 3 parameters (trend-anchor length, vol lookback, vol-percentile threshold), incrementally computed, to resist overfitting and the Layer-3 wall-clock timeout.