If you're familiar with Bitcoin then you've surely seen a chart of its exchange rate. However, price charts over long periods of time are flawed because the value (and supply) of the dollar is not constant. This chart adjusts the USD value based upon the change in the M2 money supply that has occurred since January 2009 when Bitcoin was created; the USD value is adjusted monthly based upon M2 data from the Federal Reserve.

The current BTC exchange rate adjusted to the M2 supply of USD in January 2009 is $27,642