Actually owning your own bitcoin won't be allowed
which will give more value to the BTC you actually own.
If you want no traces left in the fiat system, then cash in person is the best way to do it, yes. I've done this for years. It works well.
not very easy, at least not everywhere on the planet.
the share holders just buy and sell shares into and out of fiat. without ever touching bitcoin
so? why can't they freely do so if the wish? I mean it's their problem after all. Meanwhile, we can hold our own keys and keep doing what we want.