What If We Are Already Dead?

This is one of those topics that, while interesting to discuss about, we will never truly know the answers. I used to think alot about reality issues, and perspectives some years ago. I was obsessed with movies like the matrix, series like lost etc. But then I realized, this is my life. Even if I'm reliving it, or just experiencing it through a proxy of sorts, once it's over, it's over. Even if I get to experience the same life, or another, one more time, all the knowledge, memories, consciousness, the whole me will be dead. So I think it's best to take the best of our time instead of overworrying with the future and possibilities, like I used to do.