Interpreting exchange rates I don't know whether the graph is wrong, or I'm interpreting it wrong, but it appears to say that if I had converted a dollar ten years ago (I didn't), I would have received 20.0 XBT, and if I didn't lose it, I could today convert it to more than twenty thousand dollars.  Seems hard to believe.  Is it actually true?  The answer will not benefit me financially, but I'm extremely curious.  :-)
It's not exactly true.  Bitcoin didn't exist ten years ago.  The initial version was released in January 2009.

But it is true that early in its history, Bitcoin could be bought very cheaply, and I am sure there was a time when you could have bought 20 XBT for one dollar.  (There was a famous transaction in May 2010 when two pizzas were exchanged for 10,000 XBT.)  And it's true that 20 XBT today could be sold for over $20,000.

You should not interpret this as any sort of indication that investing in Bitcoin today, or in any other cryptocurrency, is likely to provide the same sort of returns.