Bitcoin Investment FAQ

The calculator covers dates from April 28, 2013. Choose an amount and a supported purchase date to estimate the Bitcoin acquired and its value at a current quote or a historical sale date. Older dates use monthly reference estimates, not exact daily trade prices.

Choose a purchase date during 2020 and an amount to explore that scenario. The result shows hypothetical returns and an approximate monthly drawdown. Interpolated monthly data cannot capture every daily price move during the COVID crash.

Bitcoin acquired equals the investment divided by the purchase-price estimate. Valuation equals that Bitcoin amount multiplied by the current quote or selected sale-price estimate. The calculator shows gain and return percentage. Fees and slippage are excluded; optional tax is a simplified estimate.

Dollar-Cost Averaging means buying a fixed amount at regular intervals. The calculator supports daily, weekly and calendar-month purchases in UTC. Monthly purchases keep the original day, clamped to the last day in shorter months. Regular buying does not guarantee a profit or prevent losses.

Nobody can predict future Bitcoin returns. This calculator explores historical scenarios using recorded observations and estimates; it does not recommend whether or when to invest. Past performance does not guarantee future results.

Recorded daily CoinGecko observations are used where available; the calculator footer shows their coverage. Other supported dates use interpolated monthly reference estimates or a labelled prior observation. The Time Machine identifies purchase and valuation methods and dates; DCA reports how many purchases use estimated or carried-forward prices. These are not executable trade prices.

Divide $100 by the displayed Bitcoin price to estimate the fraction of a Bitcoin it would buy, before fees and slippage. The current quote includes an as-of time and can be cached. Actual exchange execution prices may differ.

This calculator cannot identify the best future day to buy. It compares hypothetical outcomes for dates you choose. DCA spreads purchases over time, but neither DCA nor a lump sum guarantees a positive return.