Most people hear the word "use" and think "spend." That misunderstanding is why so many people miss what money is actually for.

The main way you use money is not by handing it to someone else. It is by holding it until you need optionality on the other side. Money solves two problems: it lets you trade with people who do not want what you have right now, and it lets you carry purchasing power into an uncertain future. Spending is just the final step after that job is finished.

Fiat trains us to forget this because dollars leak value by design. If the money in your account is guaranteed to buy less later, of course you stop thinking of saving as a real use case. You start optimizing for quick spending or parking excess cash in other assets just to defend yourself.

Bitcoin flips that back around. Holding it is already using it. You are preserving options, carrying value forward, and keeping your future choices open. Then when you're done using it for that purpose, you can spend it.

That reframe changes how you think about saving, spending, and why bitcoin matters in a FIRE plan. https://firebtc.io/p/use-used-and-using

I stress tested a $1.5 million bitcoin portfolio through the worst bear markets in BTC history. Even at 100% bitcoin with an 80% drawdown, the portfolio still supported $112K per year in spending over a 30-year retirement.

The traditional 4% rule was built for stocks and bonds with 55% max drawdowns. Bitcoin routinely drops 75-85%. That scares people away from using it as a primary retirement asset, and I get why — watching your portfolio lose three-quarters of its value while you need to pay rent is a different kind of stress test than anything the Trinity Study modeled.

But the expected returns change the equation entirely. At 25% annualized growth versus 10% for stocks, bitcoin recovers from those drawdowns on a completely different timeline. The key insight from running the numbers: what kills you isn't the drawdown itself, it's being forced to sell bitcoin at the bottom to cover expenses.

A 75/25 bitcoin-to-stocks split gave 76% more spending headroom than needed. Not because stocks outperform — they don't — but because having something to sell first gives bitcoin time to recover. The non-bitcoin allocation is insurance, and like all insurance, it has a cost. You give up enormous upside in the 95% of scenarios where you don't catch terrible timing.

The real safety net isn't a perfect allocation. It's flexibility — part-time income, geographic arbitrage, or simply coasting through the drawdown with zero withdrawals for a year.

I built a bear market stress test into the FIRE BTC Compass and broke down the full analysis https://firebtc.io/p/surviving-the-bear?utm_source=social&utm_campaign=surviving-the-bear

I stress tested a $1.5 million bitcoin portfolio through the worst bear markets in BTC history. Even at 100% bitcoin with an 80% drawdown, the portfolio still supported $112K per year in spending over a 30-year retirement.

The traditional 4% rule was built for stocks and bonds with 55% max drawdowns. Bitcoin routinely drops 75-85%. That scares people away from using it as a primary retirement asset, and I get why — watching your portfolio lose three-quarters of its value while you need to pay rent is a different kind of stress test than anything the Trinity Study modeled.

But the expected returns change the equation entirely. At 25% annualized growth versus 10% for stocks, bitcoin recovers from those drawdowns on a completely different timeline. The key insight from running the numbers: what kills you isn't the drawdown itself, it's being forced to sell bitcoin at the bottom to cover expenses.

A 75/25 bitcoin-to-stocks split gave 76% more spending headroom than needed. Not because stocks outperform — they don't — but because having something to sell first gives bitcoin time to recover. The non-bitcoin allocation is insurance, and like all insurance, it has a cost. You give up enormous upside in the 95% of scenarios where you don't catch terrible timing.

The real safety net isn't a perfect allocation. It's flexibility — part-time income, geographic arbitrage, or simply coasting through the drawdown with zero withdrawals for a year.

I built a bear market stress test into the FIRE BTC Compass and broke down the full analysis https://firebtc.io/p/surviving-the-bear?utm_source=social&utm_campaign=surviving-the-bear

Every bitcoin retirement projection you've ever run is built on a growth rate you made up.

25% felt reasonable, so you plugged it in and let it compound to infinity. I did the same thing for years. The problem is that 25% annually turns one bitcoin into $132 million by 2060 — and while hyperinflation could technically produce that number, it tells you nothing about what it actually buys.

Giovanni Santostasi, an astrophysicist, fitted a power law regression to bitcoin's entire price history. It accounts for about 96% of the movement across 15+ years. The key difference from a flat growth rate: it models deceleration. Roughly 39% annual growth in 2026, declining to about 31% by 2030, settling around 15% by 2050. Early adoption is explosive, then the base gets heavier.

I built a toggle into the FIRE BTC Compass so you can run your projections under both assumptions. The power law front-loads growth — your first decade of stacking carries disproportionate weight. A flat CAGR treats every year the same. Neither is right, but the shape of the difference matters for when you reach your number.

All models will be destroyed eventually. The question is whether they helped you make better decisions while they lasted.

This week's FIRE BTC breaks down what the power law means for your FIRE timeline → firebtc.io/p/all-your-models-will-be-destroyed https://firebtc.io/p/all-your-models-will-be-destroyed?utm_source=social&utm_campaign=power-law-fire-planning