Matter/energy can neither be created nor destroyed. So in a given volume, there's a finite amount of energy, whether it be kinetic or potential, at any given moment.
So, would increased activity in one area result in lower energy, or decreased activity in another? Of course energy is recycled, but only so much action can take place, universe-wide, in any given moment. If you consciously engage in more activity than you might have otherwise, perhaps you really are "stealing time", "seizing the moment" or "getting a bigger piece of the action".
If a moment is a quantum unit of time (in laymen's terms), it's value is proportional (somehow, I'll let more competent folk work the math if you wish), to the total amount of matter/energy within the observed volume.
I don't know if that's a new idea, but it's new to me.