More than hundred years later, oil price may be down because of advancement in renewable energy. At that time all of the power plants, machines, devices will be depend on green energy sources.
I think that oil prices will rise in the future, due to the increase in demand for it, as well as the depletion of wells in some countries and the decline in world stockpiles.
Depending on the reality of natural consumption, global industrial growth and the depletion of many oil wells, oil prices are expected to rise. However, prices depend in part on global political positions and the war that may be witnessed soon as expected, prices remain fluctuating between increasing and decreasing.