Not necessarily. I might want to spend it. I might not want something physically accessible lying around. I may want it all installed in a hardware wallet.
I really couldn'tbe arsed with face to face sales and showing up with a sawn off in my panties. I like the sound of a legit auction house but a long wait could be in order indeed.
For an alternative to the sawed off shotgun idea....US seller, European buyer....both fly to Heathrow arriving around the same time. Meet in the really fun Polish bar owned by the angry old Polish woman and do the exchange there. You know the other guy isn't armed because you are still in the terminal of an airport. Seller can fly with the coin in his pocket the entire trip. Both get on return flights never leaving the terminal.
Talk about high transaction costs