Free Bitcoin FIRE / Retirement Estimator (Inflation Adjusted)

Hey folks, I was working on figuring out my FIRE (Financial Independence, Retire Early) timeline and ran into an issue. Most calculators either don't incorporate Bitcoin at all or are just overly optimistic tools that expect crazy 200% returns every year. I needed something realistic that combines a traditional fiat investment approach (using the well-known 4% rule) with a cautious Bitcoin portion, all while properly accounting for actual inflation. Since I couldn't find anything decent, I created a straightforward web tool for my own use. You can try it out here: https://threedolar.com.br/en/bitcoin-retirement-calculator/ Here’s how it works / What’s included: It combines your current traditional investments with your BTC holdings. You can set your own conservative year-over-year growth rates for both types of assets. It adjusts the final figures to reflect the real impact of inflation. It shows how even a tiny Bitcoin investment can affect your retirement timeline. Just to be clear: this tool is completely free. No email hassles, no sign-ups, and no nonsense. I’m sharing this here because I know this community understands the math involved. I’d love to hear your honest thoughts: Does the math behind it work for your own projections? Are there any particular factors or corner cases I should consider adding in future updates? Thanks!