I have an idea for a book. It is about a guy who, when he is watching a game of american football, knows before every play, how it going to pan out, whether the ball will be intercept, completed for another play, and so on. The guy is not psychic and doesn't not know the result before hand. I am thinking that the guy bets in play, but makes that much money, he attracts the attention, of gambling gangs from Asia.
A story concept means nothing. I can tell you now, it has been done before. What matters is how you write it, the characterization, the flow, the imagery, all of it. There's no benefit in asking what other people think of the concept! They'll either say,"Sounds great," or, "it sounds like a ripoff of..." If the idea stirs you, write it. Then ask people what they think of the final story. After they tell you what they don't like about it, revise it, usually several times, until you're happy with it or until you throw up your hands and say the hell with it. Please read this thread about What is Plot Creation and Development? At this point, it sounds like you have only the sketchiest notion of a storyline anyway. Assume it will work -- it will if you write it well enough -- and dive into it.
