"If you want to take the risk of taking possession of physical, storing physical and then selling it when the time comes:..........."
if a store of physical is well hidden eg. buried and no one else knows about it, the risk is minimal, particularly if it was bought anonymously - imo the risk is about zero.
Compare that to the whole lot being in someone else's safe (supposedly.
As to selling ----------- easy, just don't take a huge amount at any one time. Find a couple of dealers you trust over at least a medium period -- trial it, keep your mouth shut and again ------ very low risk.
What are the other options?
Having it deposited with someone?
Well, we have the runs on the board with that already eh? If they go broke - your assets are counted in with theirs.
If you cash out successfully - the Europeans have shown the way ----------- confiscation of your cash.