Well I think it depends on what you do. I mean..if you live to do nothing until you die..then surely for you life might be pointless, it's a valid opinion. If instead of doing nothing, you have goals, aims, something to hang on in you life...a person, you family, god (personally i'm atheist, but some people live to please the God in which they believe, and I respect them) or any other goal, like living for a dream job...or just living to have a family...then from that point of view it isn't pointless at all.
Still there are many opinions about this, many beliefs, many examples, but in the end, as I've said...it depends on what you want to do with your life.
basiclly this is the same that Hawkfish said, but just a little bit more detailed.