The media always tells the story this way: Joe Person traded eg 10,000 bitcoins for some pizza, in what is believed to be the first commercial transaction.
You know what they always miss in the story? Joe Person did that same deal several times, which you can see by reading the forum thread that still exists. Joe Person missed out on a billion dollars in Bitcoin value in exchange for maybe a dozen pizzas.
How did Joe Person get tens of thousands of bitcoins? That's how easy it was to mine back then.