Helium in the atmosphere could not be depleted but its' extraction is still expensive while a rig where you can extract it from the rocks might be cheaper. It's

Helium in the atmosphere could not be depleted but its' extraction is still expensive while a rig where you can extract it from the rocks might be cheaper. It's all about extraction and processing engineering, let's see what would happen in the next few years. I remember about the soviets that were drilling in the Kola peninsula and the mud they get from it literally boiled hydrogen and helium, but that was too expensive.