A Bitcoin retirement calculator: spending $100,000 per year, assuming 7% inflation, living to age 100, and using a 5th-percentile power-law model to estimate how much Bitcoin is needed to retire today—at age 25: 7.92 BTC, age 35: 7.80 BTC, age 45: 7.67 BTC, age 55: 7.53 BTC. From age 25 to 55, the required amount only drops from 7.92 to 7.53—almost unchanged. The gap is swallowed up by the growth assumptions embedded in the model. This is only a static projection under a single set of assumptions; extrapolation beyond the power law can be overly optimistic—so take the numbers with a grain of salt.