Most surprising thing in bitcoin history for me was the profitability of mining bitcoin.

Has anyone here watched "big bang theory" the bitcoin episode? Although it was just a movie their illustration made me consider the most surprising thing in bitcoin history as the profitability of mining bitcoin. The early miners just did it for fun because technically it had no value. Based on the movie, If I can recall correctly one of the actors told the others "so you mean we get to sit down all day solving mathematical problem and end up with worthless coins we can't spend? Then they replied "Sounds fun".

After watching that movie I came to a conclusion that the early miners that believe in bitcoin to the extent they even mined in losses are the true heros.