It would make more logic for more people, or even everyone, to be a real true everyday practicing believer than a non-believer.
The gain you get even if God does not exist:
If everyone, or most everyone, were a real true everyday practicing believer the world would be a much better place to live our lives in. People get along together better, people are happier life is good. Then you die and there's nothing, God was a fake ... what did you gain? A better one and only life and a more comfortable death being positive that in moments everything will be perfect, so why worry or be frightened?
OK, there was no God, there was no payoff at the end. So what? What did it cost you? What did you lose? Nothing.
The double gain if God exists:
Imagine the same as above, but it turns out that God exists and (pick a religion) is true and you, no pun intended, follow it religiously, and then die and end up in Heaven ... you won the daily double. You not only were able to lead a better life, but you got the big bonus at the end.
The loss if you do not believe and God does not exist:
You live a less happy less fulfilling life than you otherwise would have, and then you die and it doesn't really matter anymore because you no longer exist.
The double loss if God exists and you do not believe.
You live a less happy less fulfilling life than you otherwise would have, and then you die and it doesn't really matter anymore because now you're in real shit, you're in Hell and what you thought was a less than wonderful totally fulfilling life sounds like Heaven compared to your new predicament.
For those things alone, everyone, or most everyone, should be a believer. The pros, especially considering the importance of them in one scenario, outweighs the cons by more than enough of a valid reason why everyone, or at least as many as possible could and would believe.