Granddad offered me one hundred dollars if I would cut my mop of curly hair into a neat military style. Just before the wedding, I got a light trim. It wasn't enough for Granddad, and he didn't pay.
The future will use and dispose of the memories of people that we knew as history sees fit.
I think the power of a grandchild is it taps an instinct that people later in life also have towards... the world of nonprofits or charities. They want to leave a better place.