My life is insignificant?

I don't know what made me start thinking this way, but for about a week all I can think about is how some people are so significant, and some lives are important to no one. All I think is about how I want to be important and remembered when I grow up. I see LeBron James on TV and think about how he is getting payed millions to do what he loves. I see Ed Helms acting and making people laugh till they cry. Im not saying I want to be famous, Im not saying basketball or acting are important careers.I constantly think about how some people grow up, and die in the same small town they were born in doing some boring job. Idk why Im thinking about all this, its bugs the crap out of me. I guess Im just hoping that when Im older I will be doing something I love and have a good life. I stress to much on pointless things that as of right now are kinda out of my hands. I focus to much on the future instead of thinking about how I can get there. : / Can anyone help me to better understand all this?