What this chart shows
On the date you choose, this page converts your amount into Bitcoin at that day's actual historical price, then multiplies the resulting BTC balance by every subsequent day's price to trace what it would be worth over time.
This is the single-purchase counterpart to the DCA Calculator on this site — useful for testing a specific "what if I had bought on this exact day" question, rather than a recurring schedule.
How to read it
The stat cards summarize the outcome: your initial investment, current value, total return, and the multiple your money has grown by. Try a date right before a crash and a date right before a rally back to back — the difference in outcome from the same strategy is the point.
Limitations
This assumes a single purchase executes exactly at that day's Coin Metrics reference price with zero fees or slippage. Real trades would cost somewhat more after exchange fees and spread.
A lump-sum result is extremely sensitive to the exact date chosen. Bitcoin's daily volatility (see the Volatility page on this site) means picking a date a few weeks earlier or later can change the outcome dramatically — that sensitivity is real, not a quirk of this calculator.
Past performance of a single purchase date says nothing about what a purchase made today would return. Every result here describes history, not a forecast.