Some day gas and crude oil will be a thing of the past. With innovations here and there. In your own opinion what will replace gas and crude oil in the international market.
For a long time, we have already been using water to generate electricity, and we also use solar power for electricity generation. Now we have cars that depend on water, specifically hydro cars.
We also have electric cars that need to be charged to function, and a time is coming when there will be solar cars. As the world continues to innovate, there will be new developments that will not depend on gas and crude oil, which will definitely affect the value of gas and crude. That is why I pity countries that solely depend on oil and gas as a source of revenue because a time is coming when the value of crude and gas won't be what it is today.