Everything dies so what is the?

everything dies so what is the point of it all i am not a god believer but i do see some sense in reincarnation but if every single thing even the universe has an end if i killed my self now ( i am not going to ) would it make a difference. when i was younger and christian i still had a nagging thought that i have lived more than once how many times i don't know what i don't know. is that stupid to believe in.