The point of labor is to turn raw materials and energy into useful things and perforn services. When robots do this, those who own raw materials and energy will have increasing power.

I would invest in farm land, mines, water and solar panels. In the future we will have automated mining and prospecting robots that are tied to automated foundries that are tied to 3d printing and other forms of automated manufacturing. Within a small area you could have a fully vertically integrated brick factory or metal chair factory.

In the Soviet Union they once built a iron smelting factory out in the middle of nowhere near a big iron containing mountain. The engineers said they should build it near a population center, like in the west. It was very inefficient in the end because once the deposit ran out they had to ship the iron and people in to work there. In the future, the factory will be containerized and move itself around to where it's most convenient and that doesn't have to mean near a population center, because it will be fully automated.