if I try and live my life according to what I believe to be true i.e. try and be a true Christian and when I die I find it was all a con, then the worst that's happened is I've hopefully led a good life - however, the flip-side is that if the Bible teaching is correct and it is the case that Heaven and Hell does exist and that a decision is required which can't be made after death then I wouldn't want to have not made an informed choice.
As I've pointed out before, the flipside is that you've been following the wrong book, and the wrong religion, and that the gods that you should have been worshipping are really pissed off with you.
Surely you realise this as an equally valid possibility?
