You’re thinking of Pascal’s wager,aknown logical fallacy. What if Islam is right? Then we both go to hell. What if the Jews are right? The Hindus? The Buddhists? The Seikhs? The Shintoists? The big problem with your statement is that all of the thousands of religions have an equal chance of being right. However, with absence of evidence for all of them (with the possible exception of Buddhism, which is non-theistic) there is no reason to believe in any of their supernatural nonsense. Therefore, atheism is the most rational position.