To me - absolute zero Kelvin would indicate zero volts since there is no activity whatsoever in an atom. An atom above zero K would have some sort of an electron activity or electron volt, hence not a true "Zero".

You are conflating three units here. Do you really think there can be no voltage at 0° K?

Voltage comes from arrangement of charges. It does not matter whether or not they are jiggling around.

 

I'm not a physicist. And in terms of absolute zero volts or absolute zero degrees (F, C or K), all I'm saying is what we call ground is basically a reference to a common understanding. Ground is thought of as being zero volts. But who knows?! Maybe the planet earth is bathed in unrecognized volts. Perhaps what we call ground is planet earth ground, which may be at some static level hundreds or thousands to even trillions of static volts. Regardless of what the planet earth sits at for potential, we call ground zero volts. But is it?

Suppose Earth is at some static level of positively charged ions while Mars is at some static level of negatively charged ions. If the two planets get close enough to each other there would be the most dramatic lighting storm of all times. OR perhaps the planets are held in orbit by gravity but repelled by like charges keeping them from falling into the sun in a decaying orbit. All theory and speculation. And probably some foolish notion. ALL I'm saying is "What IS ground?"

 

Suddenly I realize we're getting off topic. So if you want to continue the discussion that's up to you. As for me - I'm not going to pursue this topic "what is ground" on this thread. Perhaps it might make an interesting "Off Topic" thread. Maybe not.