Creation of bitcoin was great thing, it needed some background story and it happened, scenario: Satoshi created bitcoin, mined 1 million btc and then disappeared. Why was he with us for a while? It's still unknown and also why he disappeared but I have own versions on this.
1. Maybe he disappeared because he got 1 million bitcoin, enough money for his life. Revealing of his identity would be very risky and dangerous for his health/wealth. Remember why bitmixer owner closed real and super money making machine, his website? He earned money and closed to feel safe, did best thing.
2. What benefit would he get from being in a game? Satoshi gone, bitcoin alone and rises. No fear for satoshi but to see huge gains and profits. Which is better, to be under stress or to sit at home, watch TV and be billionaire? Almost everyone dreams that last one and satoshi turned that dream into reality for him.
3. We can say a lot of variants, maybe it wasn't done by individual and planned from governments? Look bitcoin like a virus, you think it's unbeatable (anonymous) and there is no antidote (way to track transactions) but in reality there is and creators own that. Then this last one sounds logical too.