https://en.wikipedia.org/wiki/Ionosphere The ionosphere is a shell of electrons and electrically charged atoms and molecules that surrounds the Earth, stretching from a height of about 50 km (31 mi) to more than 1,000 km (620 mi)
On the other hand.
A "ground" is usually idealized as an infinite source or sink for charge, which can absorb an unlimited amount of current without changing its potential.
And We also Know that balloon named BU60-1 has attained highest altitude of 53.0 km (53 Km means it entered the ionosphere)
So, I am wondering if may be someday we should try this. Even is that possible to connect ground and ionosphere.
By the way, I love to think about something that is completely bizarre. Besides this I can understand problems in doing so like; Weight, material, amount of charges (if able to establish) and various others (honestly, at the moment I don't remember/know). Well, my choice of material for path is very non-conducting type such ordinary thread or anything else that is not much expensive. I have started wondering already.
If you don't want to be specific, that is great but please don't involve too much mathematics in explanation (if there is one!). Answer in such a way that everyone understand and make them love science and specially Physics.