".....for sure..."?
If your talking about remains, yes. The body decays and bones, teeth and hair can last for centuries.
If you are referring to our "soul" that is just speculation and a handy tool for those who want to exploit you while alive to do as they say.
Some say that even if it isn't true, it can give people comfort to believe there is an afterlife.
Sorry, but I'm not into a fantasy world.
I agree with the comment above " The only thing anyone can say for sure is that we should make this life count."