Three ways to stack BTC
If you want to accumulate Bitcoin long-term, there are essentially three canonical strategies:
- HODL / Lump-Sum — buy everything on one day, then hold. Maximum time-in-market, maximum drawdown risk upfront.
- Static DCA — same amount every week or month, no matter what. Smooths entry drawdowns but completely ignores where we are in the cycle.
- Ladder Stacking — buy more when the cycle is favorable (low score), buy less or sell when overheated. Position sizing by score bands.
The first two you find in any crypto forum. The third is the interesting one — and exactly the one we've now built as a calculator, since we already have the cycle score in the backend.
How Ladder Stacking works
The calculator uses five Z-Score bands per the CSH original concept:
| Z-Score band | Action | Multiplier |
|---|---|---|
| 0 – 30 | Aggressive buy | 4× Base |
| 30 – 50 | Elevated buy | 2× Base |
| 50 – 70 | Normal buy | 1× Base |
| 70 – 85 | Active trim | −5% holdings/month |
| 85 – 100 | Aggressive trim | −10% holdings/month |
Specifically: buy actions weekly (every Monday), trim actions monthly (first Monday of the month). Cash not yet deployed earns 4% APY between purchases.
This is no magical algorithm. It's "buy more low, sell some high" — but data-driven instead of by gut feeling.
Backward view: what would have happened?
You pick a cycle preset (Cycle 2018 / Cycle 2022 / Current Cycle 2025) and an investment amount. We simulate all three strategies in parallel against the actual BTC price path from there to today.
Output: three cards side by side with BTC end balance, EUR end value, multiplier, drawdown, action count. Plus an equity chart with three lines. Plus a summary that names the winner and gives Ladder vs HODL as a multiplier difference.
Example output for Cycle 2022 start with €10,000:
- HODL: 1.69× — €16,900, BTC balance 0.21 BTC, max DD −67%
- Static DCA: 2.08× — €20,800, BTC balance 0.25 BTC, max DD −45%
- Ladder: 2.44× — €24,400, BTC balance 0.30 BTC, max DD −48%
These are real values from our acceptance test. Ladder beats HODL by factor 1.45 at significantly lower drawdown. That's not magic — it's "buy 4× in bear phases, trim 5–10% in bull tops".
Forward view: what do historical analogs show?
Here it gets more honest than any classical calculator. Instead of playing prediction — which would be unserious — the forward view searches historical weeks where the Z-Score sat in a ±5-point window around today's value, and simulates all three strategies from each of those anchors over your horizon.
That produces a distribution: median outcome, best-case analog, worst-case analog plus number of analogs found.
Today (as of 2026-05-10) Z-Score is 51 — mid-cycle, band 50–70 with 1× buy. At horizon 4 years, the forward view finds ~199 historical analogs in the ±5 window (Z=46 to 56).
Output table looks like this (illustrative, real values vary):
| Median | Best | Worst | |
|---|---|---|---|
| HODL | €28,000 | €72,000 | €14,000 |
| Static DCA | €21,000 | €33,000 | €15,000 |
| Ladder | €26,000 | €40,000 | €17,000 |
Read the worst-case column. That's the most important value. Ladder has the highest worst-case of the three — that's drawdown protection from the trim behavior in overheated phases.
Why not just all-in HODL?
Look at the best-case number. HODL can win the most because lump-sum at the bottom compounds dreamily. But HODL's worst-case is also the lowest — and the median sits between Static DCA and Ladder.
The honest answer: HODL is the right strategy when you're sure we're at the bottom. When you're not sure — and nobody is — Ladder is the better risk-reward compromise.
The Free/Pro split
- Free: Three cycle presets (2018, 2022, Current), end point = today, horizons 1/2/4 years, tolerance ±5 fixed.
- Pro+: Custom start date (≥ 2018-12, where our Z-Score data begins), custom end point, horizons up to 10 years, custom tolerance, custom cash APY, custom bands, CSV export.
What you can do now
- Three-Paths Calculator (Phase 1) shows you "what happens if you sell BTC for living vs borrow vs borrow+buy". Sat lifestyle question.
- Ladder Stacking Calculator shows you "what would have been better — lump sum, equal DCA, or cycle-aware bands". Sat accumulation question.
Both are now live under /dashboard/bitcoin/lifestyle. The sub-sub-nav "Three Paths ↔ Ladder Stacking" makes the switch one-click.
Takeaways
- Static DCA ignores the cycle. If you have the Z-Score anyway, that's wasted information.
- Ladder Stacking = buy more low, sell some high, by 5 Z-Score bands.
- Backward view shows what historically would have happened. Ladder beats HODL by factor 1.45 in the Cycle 2022 backtest at lower drawdown.
- Forward view searches historical analogs to today's Z-Score, gives median/best/worst per strategy.
- Read worst-case first. Ladder has structurally the highest worst-case via the trim behavior.