Back in 2019 and 2020, Stock-to-Flow convinced me to stack significantly more sats than I otherwise would have. The model eventually broke, but those sats are worth considerably more today. That experience changed how I think about models. A model doesn't need to predict the future perfectly to improve your decisions, but you do need to understand where its assumptions stop making sense. Every FIRE calculator asks for a portfolio growth rate. I used a flat 25% bitcoin CAGR in my own planning for years, but carrying that rate to 2060 puts one bitcoin above $132 million. That dollar figure says little about future purchasing power, and constant exponential growth is a poor fit for a maturing network. The bitcoin power law offers a decelerating alternative. In a 30-year comparison, $10,000 grows faster under the power law and sits roughly 59% ahead of flat 25% around 2035. The paths cross around 2047, then the flat rate pulls ahead because it never slows down. Neither path is a promise. Run your FIRE plan through both, see how much your date moves, and choose assumptions conservative enough to keep acting when the market refuses to follow the curve. The shape of growth matters because earlier stacking gets more time at higher rates. See the full comparison and use the framework to stress-test your own FIRE timeline:

📐 All Your Models Will Be Destroyed

FIRE BTC Issue #71 - The Power Law, your FIRE plan, and why being directionally correct beats being precisely wrong

FIRE often gets framed as one finish line: build a portfolio worth 25× your annual expenses, then you're financially independent. That framing hides much of what your savings can do for you along the way. A portfolio that covers a year of expenses gives you stability. At 5×, you have more room to take a career risk. At 10-15×, your portfolio may cover enough of your spending to make part-time or lower-stress work realistic. Those aren't consolation prizes. They're increasing degrees of autonomy, and you don't need to wait for full FIRE to use them. The useful number to track is your portfolio divided by your annual expenses. As that multiple rises, the question changes from “When can I retire?” to “What choices can my portfolio support now?” Maybe the answer is a larger emergency buffer, a job with better hours, or more time spent on work you actually care about. The point of building wealth is to give yourself options. Start using them deliberately as they appear.

In 2018, Harvard economist Kenneth Rogoff said bitcoin was far more likely to fall to $100 than reach $100,000. Bitcoin later cleared $100,000, and Harvard's endowment disclosed more than $100 million in BlackRock's IBIT. That is a fairly expensive rebuttal from Rogoff's own institution. His miss came from three assumptions: bitcoin was mainly for criminals, governments would regulate it into irrelevance, and it had no meaningful utility without illicit use. Each assumption treated permissionless access, borderless settlement, and censorship resistance as defects. For people facing capital controls, broken currencies, or limited banking access, those features are the product. The deeper problem was trust. If your career rests on the belief that governments, central banks, and established institutions are competent stewards of money, bitcoin looks like an unnecessary challenge to a system that basically works. Evidence that falls outside that worldview is easy to dismiss. FIRE investors can't outsource judgment to credentials. We have to compare the claim with adoption, incentives, and what institutions do with their own capital. When a prediction and a balance sheet disagree, which one deserves more weight? Read the full argument:

🤌 Harvard Humbled

FIRE BTC #44 - Bad bitcoin takes from Ivy League elites

Bitcoin conviction can become a liability when the cash needed for payroll, vendors, taxes, or household expenses is also exposed to bitcoin's price. Volatility becomes dangerous when a payment deadline arrives during a deep drawdown. If every dollar of liquidity was converted to bitcoin, the calendar gets to choose when you sell. A temporary price decline can become a permanent loss of sats, and the long-term thesis never gets enough time to play out. This is why a business can be deeply committed to bitcoin and still hold predictable operating cash. The same logic applies to a household pursuing FIRE: bitcoin can be the long-term savings asset while dollars cover near-term obligations. Each asset has a different job. The useful question is how much cash you need so that a bad year can't force you to sell. Define that runway from actual expenses and known obligations, then keep it separate from capital you're willing to expose to a drawdown. Cash may feel unproductive during a bull market, but the optionality it buys is what lets your bitcoin remain long-term savings.

I once wrote down 21 FIRE + bitcoin resolutions, but the useful part wasn't the size of the list. It was the sequence. Start with last year's expenses. Separate what improved your life from what you barely remember buying, then cut the waste. That lowers the portfolio you need for FIRE and frees up money to buy assets today. Next, redirect those savings into an automated plan. A recurring bitcoin DCA removes a weekly decision and makes paying yourself first the default. As the stack grows, the job changes from accumulation alone to protection: learn self-custody, decide whether multisig fits, and build an estate and bitcoin succession plan your family can actually execute. Then model the life you're trying to fund. FIRE can train you to avoid spending so effectively that spending on a better life feels wrong, even after you've earned the freedom to do it. Travel, time with family, and useful comforts belong in the plan if you value them. The 21 resolutions cover everything from selling unused stuff to stacking sats with your kids, but they work best as one system: spend deliberately, save automatically, hold bitcoin securely, and use the resulting freedom on purpose. Which part of that system is weakest in your plan? Read all 21:

2️⃣1️⃣ Resolutions for 2025

FIRE BTC Issue #15 - Bitcoin + FIRE goals for the new year

“Paying off my mortgage gives me peace of mind.” I hear that a lot, and I understand the appeal. But if I had an extra $100,000 and a 5% fixed-rate mortgage, I’d compare that guaranteed 5% return with what the money could do elsewhere. On a simple compound-return comparison, $100,000 growing at 5% becomes about $163,000 after 10 years. At an assumed 10%, it becomes about $259,000. At an assumed 20%, it becomes about $619,000. Those higher returns aren’t guaranteed, but the opportunity cost of prepaying the mortgage is real. A 30-year fixed mortgage also has unusually friendly terms. The payment is predictable, it can’t be called because the house falls in value, and inflation reduces its real burden over time. Meanwhile, extra principal becomes home equity, which isn’t easy to spend during a job loss or medical emergency. Keeping the mortgage and investing the difference can give you a larger portfolio and liquid reserves that cover years of payments. That doesn’t mean everyone should maximize debt. Your rate, taxes, cash flow, risk tolerance, and investing discipline still count. Test the decision against your full balance sheet: Will paying it off leave you safer, more flexible, and better able to buy your freedom? Run the mortgage decision against liquidity, opportunity cost, and your own risk tolerance:

🧘 Peace of Mind

FIRE BTC #40 - Why paying off your mortgage early makes you poorer

“Paying off my mortgage gives me peace of mind.” Suppose you have $100,000 and a 5% mortgage. Put the money toward principal and, after 10 years, you've captured about $163,000 of value. At the assumptions used in this piece, the same $100,000 grows to roughly $259,000 in the S&P 500 at 10%, or $619,000 in bitcoin at 20%. Those returns aren't guaranteed, while the 5% savings is. Still, the comparison shows how expensive emotional comfort can become when the alternative has a decade to compound. A 30-year fixed mortgage also gets easier to carry over time. The payment stays predictable while inflation reduces its real cost, and the lender can't demand more collateral because your house falls in value. That makes it very different from margin debt. The other cost of prepaying is liquidity. Once cash becomes home equity, paying for a job loss or medical bill may require a refinance or sale. A liquid portfolio can be sold incrementally, cover years of mortgage payments, and keep compounding during normal times. Of course, this only works if you can tolerate volatility, maintain a cash buffer, and invest the difference instead of spending it. The useful question is whether a zero mortgage balance makes you safer than having enough liquid assets to cover the payment for years. Read Peace of Mind:

🧘 Peace of Mind

FIRE BTC #40 - Why paying off your mortgage early makes you poorer

Bitcoin doesn't have to be an all-or-nothing decision in a FIRE portfolio. An eight-year comparison of weekly $100 contributions split between VTI and bitcoin found that even partial bitcoin allocations produced a higher ending value than the VTI-only portfolio, while larger allocations also exposed the saver to deeper temporary losses during bitcoin drawdowns. That tradeoff matters more than the upside number. The same analysis covered four periods when bitcoin fell between 55% and 84%. A large allocation can shorten the path to financial independence if the asset performs well, but it won't help if the volatility causes you to abandon the plan at the worst time. If you understand bitcoin's role as scarce, globally accessible savings but aren't comfortable making it a major position, start smaller. Choose a percentage by working backward from the drawdown you could tolerate while continuing to save. Then let your allocation grow only as your understanding and conviction grow. The right first allocation isn't the one with the most exciting spreadsheet result. It's the one you can actually hold.

After 72 issues, I went back through FIRE BTC to see which ideas readers kept returning to. The favorites ranged from a 4-year stacking sprint and the 4% rule to W-2 strategy, STRC leverage, and 9 levels of financial independence. FIRE plans can fail in different places. You can have a strong savings rate and a fuzzy target, a large bitcoin position and weak emergency liquidity, or enough assets to leave your job while still treating the paycheck as your identity. These eight articles attack those problems from different angles. One challenges Mr. Money Mustache's case against bitcoin. Another asks whether a 4-year stacking sprint can compress the FIRE timeline. The 4% rule piece tests stock-and-bond withdrawal assumptions, while the W-2 piece treats your job as funding for your personal balance sheet. The rest covers my STRC carry trade and its stress test, the 9 levels of financial independence, emergency planning that protects you from selling bitcoin at the wrong time, and the opportunity cost of paying off a low-rate mortgage early. You probably don't need all eight ideas today. Which part of your plan needs work next: the target, the timeline, the job, liquidity, debt, or withdrawals? Use this collection to find the right place to start:

🏆 The Best of FIRE BTC

FIRE BTC Issue #72 - The most popular articles from 70+ issues, all in one place

A bitcoin bear market can make a disciplined saver feel like the last person left in the room. ETF outflows and treasury-company selling get the headlines because institutions were supposed to validate the asset. When those vehicles become sellers and bitcoin remains resilient, the more useful question is who can own the coins without needing next month's price to rescue them. The answer appears to be people and businesses with income, low leverage, and enough patience to buy without an immediate payoff. That group is less visible than an ETF launch, but it is much harder to force out. If you're spending less than you earn, keeping cash flow healthy, and buying bitcoin on a schedule you can sustain, this market is testing the exact habits your plan was built around. You don't need to call the bottom. You need to avoid leverage, protect your liquidity, and keep your time horizon longer than a forced seller's funding window. Institutional adoption can expand access, but bitcoin's durability still comes from distributed ownership. A sound plan doesn't depend on an ETF, a treasury company, or anyone else absorbing every coin offered for sale.

My STRC experiment looked easy while shares sat near $100 and an 11.5% dividend kept arriving. I borrowed through a HELOC, collected the cash, and used it to buy bitcoin. Then STRC traded down to $82.53. Using a $50,000 example with my economics, the position was down about $5,222 after distributions and interest at a share price of $84.54. The trade had gone against me, but the financing hadn't forced me to sell. Margin debt is marked against the securities in your account. When the price falls far enough, your broker can demand more collateral or liquidate the position. A margin call turns volatility into a deadline. My HELOC adds risk, including a variable interest cost, but it isn't tied to STRC's daily price. As long as the payment fits my cash flow, I have time to reassess the yield, market price, and whether the experiment is worth the mental overhead. A FIRE investor needs to ask whether the asset can recover, who can force a sale, and whether the position is small enough that a bad outcome stays at the edge of the portfolio. Would your financing let you wait, or turn a drawdown into a permanent loss? Read the STRC breakdown and use it to pressure-test the debt, liquidity, and sizing behind your own leveraged position:

💥 My STRC Trade Exploded!

FIRE BTC Issue #83 - Or did it?

Financial independence gets weird when preserving the portfolio becomes more important than the life it was built to support. Strategy recently sold 32 BTC, roughly 0.0038% of the bitcoin it held before the sale. The filing said the proceeds were expected to help fund preferred-stock distributions. The amount was tiny, but the action demonstrated that bitcoin could be converted into cash when an obligation called for it. The household version is simpler. You save and invest so that, eventually, your assets can cover expenses and make a paycheck optional. I still think bitcoin should usually be the last asset sold because its long-term upside deserves room to compound. But refusing to sell under any circumstances can turn a useful rule into a constraint. Borrowing adds interest and repayment risk, while selling can sometimes settle the expense cleanly. A strong FIRE plan gives you choices. Maybe a small, deliberate sale covers a difficult year, reduces stress, or lets you spend more time with your family. In that moment, a lower bitcoin balance doesn't mean the plan failed. It means years of saving have finally become time, stability, and freedom.

Bitcoin feels dead when its price is weak, stocks are ripping, and another trade has everyone's attention. Right now, AI owns the room while bitcoin looks boring and frustrating. FIRE investors are playing a longer game than choosing the best-performing asset over the next 12 months. You're saving into assets that can preserve purchasing power for decades and eventually make your time independent from a paycheck. When price starts messing with my conviction, I ask three questions: Will fiat money keep being debased? Will the world keep becoming more digital? Is bitcoin's supply still fixed at 21 million? If the answers remain yes, weak demand today hasn't broken the savings thesis. That doesn't guarantee the bottom is in. Lower prices give you better terms only when your expenses are covered, your cash needs won't force a sale, and your time horizon is measured in years. Leverage can turn patience into liquidation, and self-custody still matters. During a bear market, did the asset change, or only the price? Your answer should determine whether you keep stacking, reduce risk, or admit your original thesis was wrong. The full article applies these three questions to your expenses, liquidity, and time horizon:

🪦 Bitcoin is Ded, Long Live Bitcoin

FIRE BTC Issue #84 - Rumors of bitcoin's death have been greatly exaggerated.

A tool you can access isn't necessarily a tool you control. That distinction gets easy to ignore when powerful AI is one login away. Andrew Curran uses the sudden removal of Fable as a concrete example: people could use a capability one day, then the provider made it unavailable. Whatever you think about his larger prediction for the AI race, that dependency risk is real. The same pattern matters for individuals and businesses. If one model becomes essential to how you work, earn, research, or communicate, its owner sits between you and that capability. Access can change while your need for the tool remains. The more deeply you build around it, the more expensive your exit becomes. Self-ownership doesn't require training a frontier model in your basement or refusing useful services. It requires being honest about what you're borrowing. Keep critical data portable, understand your replacement options, and avoid designing a workflow that only one provider can support. The practical goal is leverage without fragility: use the best tools available, but keep a credible path to leave.

Social Security advice usually compares two monthly checks. Claim at 62 and the benefit is smaller; wait until 70 and it is about 77% larger under current rules. Using a $1,000 full-retirement-age benefit, the choice is $700 a month at 62 or $1,240 at 70. The simple breakeven lands a little past age 80. That calculation is useful, but it treats the $67,200 of age-62 payments as if they vanish while you wait. For a financially independent household, those checks can buy bitcoin or cover expenses so your existing portfolio stays untouched. At a 10% annual return, investing $700 a month from 62 to 70 grows to about $100,000. Even after using that balance to fill the $540 monthly gap for the next decade, roughly $152,000 remains at age 80. Claiming early isn't automatic. Survivor benefits, taxes, ACA subsidies, Roth conversions, and longevity insurance can all make delaying more valuable. But your claiming age should be tested against your full balance sheet, withdrawal sequence, and time horizon. Maximizing one government check can leave you with fewer assets compounding under your control. I ran the conventional breakeven alongside the bitcoin and retained-portfolio versions here:

🧾 Social Security's Bitcoin Breakeven

FIRE BTC Issue #81 - The bigger check is probably not worth the wait.

Gold served as money for thousands of years because it was scarce, durable, and difficult to fake. The problem was that it was also heavy, slow, and expensive to move. As trade expanded, people needed claims on gold that could travel more easily than the metal itself. Those claims eventually became fiat money. Fiat made commerce faster and gave governments and banks more flexibility, but that flexibility came with a cost: the supply could now expand whenever the people controlling it decided expansion was necessary. We solved the movement problem by weakening the scarcity that made money trustworthy in the first place. That tradeoff matters when you're pursuing financial independence. FIRE asks you to exchange years of work for assets that can preserve purchasing power long enough to fund decades of future expenses. Saving in a currency designed to lose value means your target keeps moving while you're trying to reach it. Bitcoin combines properties that previous monetary systems forced us to choose between. It can move across the world in minutes, settle without a bank, and remain scarce because its supply can't be adjusted by a committee. Gold established the value of scarcity. Fiat proved the importance of speed. Bitcoin carries both lessons forward. I wrote about the monetary bridge from gold to fiat to bitcoin, and why it matters for anyone saving across decades:

🌉 The Bridge We Had to Cross

FIRE BTC Issue # 28 - Gold couldn’t keep up. Fiat filled the gap. Bitcoin finishes the job.

Global diversification sounds simple: buy funds from more countries so your portfolio isn't tied to one economy. But adding an international ticker doesn't automatically improve your FIRE portfolio. A broad US index already owns companies whose businesses span the world. Apple, NVIDIA, Google, Coca-Cola, and hundreds of others earn meaningful revenue overseas, so foreign growth and country-specific risks already flow into your returns. One low-cost fund can provide substantial global exposure without adding more moving parts to your savings plan. Stocks still have limits. You hold them through an institution, pay fees and taxes along the way, and may not have equal access to US markets depending on where you live. The index-fund playbook that works well in America isn't available to everyone. Bitcoin addresses a different problem. Its fixed supply and global, round-the-clock market are open to nearly anyone, and you can hold it directly without depending on a broker. It gives savers around the world access to the same monetary network. When you review your portfolio, count the risks your assets solve, how easily you can own them, and whether they support your expenses and time horizon, not the number of countries listed on the fund labels. I explain how US stocks provide global exposure, and where bitcoin extends it, here:

🌎 Going Global

FIRE BTC Issue #17 - Getting exposure to the world economy through bitcoin

“Never spend your bitcoin” sounds like obvious advice. Bitcoin is engineered to appreciate over time, while dollars are engineered to lose purchasing power. Why part with the good money when you can spend the bad money? The Laszlo pizza story makes the warning feel even stronger. He spent 10,000 BTC on two pizzas in 2010, and hindsight turned an early monetary transaction into a $700 million punchline. But focusing on the payment method misses the opportunity cost that matters for your FIRE plan: the expense itself. Spend $100 and your net worth falls by $100 whether you use dollars or bitcoin. If it’s a recurring $100 annual expense, a 25x FIRE target rises by $2,500. Paying in bitcoin changes your asset mix for a moment, but spending the BTC and immediately replacing it with the dollars you kept produces essentially the same allocation as paying in dollars. Transaction costs and friction still matter, of course. The useful question isn’t whether bitcoin should ever be spent. It’s whether the purchase is necessary or makes your life meaningfully better. That decision changes both how much you can invest today and how much your future portfolio needs to support. Read the full argument and the spend-and-replace example:

💳 Spending Bitcoin

FIRE BTC Issue #6 - The opportunity cost fallacy of spending bitcoin vs dollars

Traditional FIRE can accidentally make the same mistake as traditional retirement planning: it treats the finish line like the point of the game. Save enough, hit the number, quit the job, and then what? The better question is what work you would choose if income stopped being the main constraint. That’s the angle Kane McGukin took in this guest piece, and I think it fits FIRE better than the usual picture of retirement. You still need the financial base. Expenses matter. Liquidity matters. Taxes, withdrawal order, and time horizon matter. A bitcoin-heavy plan still has to survive real life, not just look good on a chart. But the number is supposed to buy optionality, not a permanent vacation from effort. Re-tiring is a cleaner goal: put new treads on your life, reduce dependence on a paycheck, and spend more time on useful work you’d do even if nobody forced you to do it. That’s a much better target than racing toward boredom with a bigger portfolio. Read the full piece here:

🚗 Time to Re-tire

FIRE BTC Issue #27 - A better alternative to traditional retirement

A lottery winner choosing $1,000 per week for life over a $1 million lump sum sounds conservative. I get the instinct. A weekly check feels stable, and a lump sum feels like a chance to mess up in public. But the annuity only works if you ignore time, inflation, and what capital can do when it is put to work. $52,000 per year takes almost 20 years to reach $1 million in nominal dollars. In real terms, the target keeps moving because the dollars arrive slowly while everything else gets more expensive. The story bothers me because it is mostly about financial education, not lottery strategy. If nobody taught you time value of money, opportunity cost, compounding, or why holding assets matters, the safer-looking option can become the expensive one. FIRE is built on the opposite lesson. You want assets now because assets give you choices later. Stocks, treasuries, bitcoin, or any serious portfolio decision should be judged by what it does to your time horizon, your expenses, and your independence. A million dollars today is more than a bigger account balance. It is a chance to turn one lucky break into a plan. Read the full archive piece:

😔 The Most Depressing Lottery Win Ever

FIRE BTC #49 – The state of financial education is rekt