80-years-old is still so far from my age right now. For me, whats matter when you old is experience and knowledge. When we get old as 80-years-old, I dont think our presence as society will be so impactful. But what we have most in the old age is a better perspective about experience and knowledge. I think thats what our descendant need in our old age. When I was growing up, I dont have any grandpa and grandma to told me any story. My last grandma passed when I was elementary school, and my last grandpa passed when I was junior high school.
As an adult, I love to hear a good story from the older one. Sometimes they have a unique story that have much moral things behind it. We need some kind of that story to be wiser in our life. And when I getting old as 80-years-old, I will try to share as much story as I can to my descendant. One of the way is by writing like this right now.
So when I ask what will matter to you the most when you get old, my answer is knowledge and experience.