He didn’t mention the currency so even you can be a millionaire in currency that has low buying power. 
I think the moral of the story for this topic is gambling make us discover the forum that introduced as to Bitcoin investment. I discover the forum due to my interest on Ponzi/Gambling/Trading Shitcoins so I can relate to the OP story regardless if he truly became millionaire.
This your reply actually made me laugh like for real that could be a point too . Literally almost everyone could be a millionaire in some currencies that are way low in market power and value. Anyways I think anyone discussing or judging based on Op's topic will likely just assume that op is referring to slightly above a million dollars. That's because most people price in dollar which is common since it's more like a regular world currency.I think the moral of the story for this topic is gambling make us discover the forum that introduced as to Bitcoin investment. I discover the forum due to my interest on Ponzi/Gambling/Trading Shitcoins so I can relate to the OP story regardless if he truly became millionaire.
Anyways for a gambler hitting 1 million, he could have been lucky more than he strategized because the truth is no matter how much people try to paint the whole thing, gambling still requires a decent amount of luck for you to be able to pull off a jackpot kind of win especially.