Significance?

Tonight while I was in bed reading, my sister comes to my side and asks "What's the point of life?" At first I'm mentally shocked. Is this her message to me about taking her own life away? No. I come back my senses and ponder. It's not to please others, for their life too doesn't matter. It's not to save the world, for everyone and everything does eventually "die". It's not to harm others or care for others. She stated that her only answer was to reproduce, but what good does that do? In the end, all lives are pointless, so why do we value life as much as we do? Do we feel we've earned to live? Hopefully not, that's just selfishness taking over convincing us that we are entitled to something we didn't actually earn.
What is the point of life? I certainly do not know. People have been pondering this question, creating copious amounts of theories that never seem to justify as the ultimate reason. Look at the world now, over 7 billion people consuming resources to depletion, ruling the world as if it's theirs to own. Looks like we did the defined job of reproducing to the max. What has our world come to? What will become of it? Wouldn't we all like to know.