I know people and businesses who don't have any bitcoin and never had it.

I know people and businesses who have bitcoin, buy it, but never sell.

But I don't know any people nor businesses who have bitcoin and sell it or trade it.

So who the hell is selling at all?

Unless any of you know closely and reliably and can directly verify anybody who is selling, I will assume that the only ones selling are miners and price manipulators who are selling to themselves.