Real numbers,
real timelines.
Anonymized case studies trace financial decisions over time, using real starting points and monthly amounts to model outcomes.
These are scenarios based on common starting points. Some composite, all plausible based on historical data. The names are made up. The scenarios are modeled; the math is real. Cases 1-3 project index returns at 7% real; Case 4 runs actual monthly Bitcoin closing prices. The goal is to show what the decisions in the order of operationsOrder of operationsA default sequence for spare money after essentials and minimum payments: a starter emergency fund, any employer retirement match, high-interest debt, a full emergency fund and tax-advantaged accounts (HSA, Roth IRA, more 401(k)), then taxable investing. Vesting, unstable income and near-term goals can shift it.Full definition produce over 5 to 10 years.
Case 1: Starting at zero at 22
22-year-old. $38,000 first job. $2,600/month take-home after taxes. $800/month rent. $0 in savings. $12,000 in student loans at 5.5%. No 401(k) contributions yet.
What they did in the first 12 months
- Months 1-3: built $1,000 starter emergency fund. Stopped all discretionary spending. Moved checking to Fidelity CMA.
- Months 4-6: aggressive student loan paydown while capturing full employer 401(k) match (3% = roughly $95/month into the plan).
- Months 7-12: student loans paid off. Opened Roth IRAIndividual Retirement Account (IRA)A retirement account with tax advantages and eligibility rules. Traditional IRA contributions may be deductible; taxable withdrawals generally enter income. Roth contributions use after-tax money, and qualified Roth withdrawals are tax-free.Full definition at Fidelity. Started $100/month Bitcoin DCADollar-cost averaging (DCA)Investing a fixed amount on a regular schedule, such as $50 every payday, regardless of price. It spreads out when money enters the market and buys more units when prices are low, but it does not guarantee a better price than investing all at once, a profit or protection against loss.Full definition on River.
10-year outcome (2014-2024 historical returns)
Key insight: four decisions. The $1,000 emergency fund. The employer matchemployer matchAn employer contribution linked to qualifying employee contributions under a plan formula. Eligibility, vesting and plan terms determine what you receive and keep. The match ratio is not an annual investment return, and the invested balance can fall.Full definition. The Roth IRA. The $100/month into Bitcoin. Ten years later, roughly $855,000. See the DCA math at Bitcoin DCA Calculator.
Case 2: Digging out at 35
35-year-old couple. $110,000 combined income. $28,000 credit card debt across 4 cards, average 22% APRAnnual Percentage Rate (APR)The yearly cost of borrowing money, shown as a percentage.Full definition. $340,000 mortgage remaining. $0 in investments. Two kids.
What they did
- Avalanche method on credit cards. Highest APR first.
- Cut expenses to create $1,800/month margin for debt payment.
- 19 months to pay off all $28,000 in card debt.
- Immediately after: opened Roth IRAs for both spouses.
- Started $200/month combined Bitcoin DCA.
- Resumed 401(k) match capture (had been suspended during debt paydown).
5-year outcome
Credit card interest saved vs minimum payments: approximately $14,000 (avalanche vs minimums over 5 years).
Roth IRAs combined after 5 years: approximately $35,000 (at 7% real, averaging contributions).
Net worth swing: from negative $28,000 (credit card debt) to approximately $65,000 in invested assets, plus mortgage paydown. The decision to fix the debt before investing made this path faster than running both simultaneously.
Case 3: High income, nothing to show for it
40-year-old. $180,000 income. Lifestyle inflationinflationA general increase in prices over time, meaning each dollar buys less than it did before.Full definition consumed everything. $4,200/month mortgage. Two car loans totaling $800/month. $0 in retirement accounts. Some equity in the home.
What they did
- Sold one car. Used proceeds to pay off both car loans ($800/month freed).
- Maxed 401(k) immediately. After-tax impact on take-home: approximately -$1,450/month (thanks to the 24% federal bracket + state tax savings). See Paycheck Optimizer.
- Opened HSAHealth Savings Account (HSA)A health savings account available only when eligibility requirements are met. Federal tax benefits depend on contribution limits and qualified medical expenses. Health coverage, other coverage and Medicare enrollment can affect eligibility; state tax treatment can differ.Full definition with high-deductible health plan. Maxed to $4,400.
- Started Roth conversionRoth conversionMoving eligible retirement money into a Roth account. Pre-tax amounts and earnings generally create taxable income; nondeductible basis is treated under the applicable aggregation rules. Conversions can affect tax brackets and income-based costs, and separate withdrawal rules apply.Full definition ladder planning for eventual early retirement.
10-year projection vs "stayed the course"
Stayed the course: net worth grows primarily via mortgage paydown and home appreciation. Retirement accounts: $0. Projected retirement age to reach $1M: approximately 65.
Changed course at 40: at 50, approximately $385,000 in tax-advantaged retirement accounts (401(k) + HSA + Roth conversion ladder). Retirement achievable at 58 instead of 65.
Case 4: The $100/month Bitcoin decision (January 2017)
Person starts $100/month Bitcoin DCA in January 2017 at ~$970/BTCBitcoin (BTC)The ticker symbol for Bitcoin, used on exchanges and in price quotes.Full definition. They live through 2017 bull run, 2018 crash, 2019-2020 accumulation, 2020-2021 run, 2022 crash, 2023-2024 recovery, 2024 halvingHalvingThe scheduled event, built into Bitcoin's code, that cuts the new bitcoin paid to miners per block in half. It happens every 210,000 blocks, about every four years; the April 2024 halving at block 840,000 cut it from 6.25 to 3.125 BTC, slowing the rate of new supply.Full definition.
What actually happened
Using actual monthly closing prices from the same dataset that powers the Bitcoin DCA Backtest tool, over ~112 months (January 2017 to April 2026):
What they lived through
- Bought in December 2017, the peak month of the 2017 bull run, at a $13,921/BTC month-end close.
- Bought through the 2018 crash, including a $3,687/BTC month-end close in December 2018.
- Bought through 2019 while Bitcoin was declared dead multiple times.
- Bought through the 2022 crash, including a $16,524/BTC month-end close in December 2022 after the FTX collapse.
- Kept buying. Never timed anything. Never sold.
This person never timed the market. They bought through the 84% crash. They bought when Bitcoin was "dead" in 2018 and 2019. The discipline of the DCA, not skill, not timing, produced the result.
Run any start date and amount yourself: Bitcoin DCA Calculator. Historical returns are not a forecast. The point of this case study is not the return figure. The point is the behavior: consistent monthly buys through multiple 70%+ drawdowns without selling.
Where to go from here
Last updated . Not financial advice. Historical returns do not guarantee future results. Disclosures · How pages are reviewed