[throwaway413]

You cannot say that with absolute confidence. Just as how people who believe in God cannot absolutely confirm what they believe to be the case either.

Also, seems like a pretty self-centered way to look at the world IMO and doesn't exactly lead me, as a fellow human, to think that you care at all about my well-being or anyone else's.

Point is - you're assuming that none of it will matter, when the facts are that 1) none of us have no clue what matters or doesn't matter after we're dead and 2) we can identify what matters to the rest of us about someone once that someone is dead, which is more concrete information than you can give me from assuming what you'll care about or not after you die.

TL;DR better safe than sorry. You're playing with fire - regardless of whether or not you believe in hell.

And by the way - I'm speaking from personal experience, as a twenty-something who makes more money than I know what to do with yet feels extremely unsatisfied and unhappy with life.