That makes no sense whatsoever.
Why take the chance with Atheism over Christianity?
Uh, what if both are wrong?
What happened to the other religions?
The only way of being totally spiritually safe would be to follow every single religious doctrine. However in doing so would contradict various rules of a variety of the religions thus making you a 'sinner'.
In which case it is impossible to completely safe with any religious choice..
So, by that regards I think I'll stay Atheist