What is the future of energy?

What is the future of energy?

First we need to understand what is the energy and second things where we are
living that is very obvious question we all know that we are living in a frame what kind of frame in which we are living so this frame is our universe and what is the component by which our universe is made up. So we have to theories relative the composition of our universe.First theory which was applicable before according this theory there are two component by which our universe made.

 first component is mass and second is energy but according to the second theory which was developed by Albert  Einstein according to e=mc^2 that means energy and mass both are same things they are not different individually so there are only two things in our universe one is energy or mass and space so our frame in which we are living this is composed by energy and space if you look this term at the view angle of physics then past present or future they exist all time but we are living in non initial frame becuase everything in our universe doing acceleration so everything which do we do that is image and when this images relate with time then we can see all images is going like movie ..so if this question is not vaild in itsself what is the future of energy we all know well energy can not be produce or not destroye so what would be the future of a thing which never be produce or never can be destroyed  it always remain constant.