David said:
Quoting limited to 4 levels deep
What you just paraphrased, probably without knowing it, was something called Pascal's Wager, named after the brilliant mathematician (but C-rate philosopher) Blaise Pascal.
You are assuming that Christianity, rather than Islam, or any other religion that says that your religion is wrong, is the "correct" religion. Suppose the true religion is Islam, and I choose between Atheism and Christianity. I can't win then, can I?
A second problem with that pathetic reasoning is that it is, as Christopher Hitchens put it, "religious hucksterism of the cheapest kind". You assume that a selfish belief based on the desire to avoid Hell is worth more than the non-belief of someone who just could not bring his or herself to believe. I ask you this, which would be worth more in God's eyes? If this is the true nature of piety, then I will have nothing to do with it.
I also take issue with your assumption that you will lose nothing if it turns out I am right. What you will have lost is your entire life to ugly, self-interested delusions.