Sure the body dies, but what is inside is incorruptible treasure.
The essence of the person lives on.
I believe we continue to return to the realm of matter and as such then occupy a new body.
I have no idea as to the particulars of this process or if people come back right away or when or even where.
All anyone really has about these matters is speculation.
But we are similar in nature (in our spiritual aspect) to the Creator (who is spirit and eternal).
Spirit is energy and energy, according to physics cannot be destroyed, only transformed.
All of reality is made of energy as well and it phases into existence and then phases out again, meaning there is a flow of energy which comes from somewhere outside of the realm of time and space, which maintains this reality we all experience, and we are intrinsically bound into this system.
People being unsatisfied with their life is due to their perspective and not a condition of life itself.
People are unsatisfied as they do not understand the way in which reality functions.
They have a lack of insight into the mechanics of things and so they also have fears as they identify with their egos which are their natural selves.
They would have satisfactions if they would connect with their spiritual aspect and thereby put the cart behind the horse rather than before the horse which is what they do when they only use their egos which is the most insignificant part of the human being.