The World's most sophisticated "prepper."
Old Jeffery needs a place for "privacy" so he has a yacht built the size of a Navy Destroyer Escort. (actually I exaggerate, it is 17 feet shorter than the ship I served on.) It takes a crew of 60 to operate. I bet it will have better bunks, a better galley, and he won't have to stand the dog watch or swab the decks..... Privacy is simpler for me, I just close the bedroom door.
We really know that the purpose of the explosion of the sales of super yachts is that they rich want a way to get away from the zombie apocalypse when the breakdown of law and order hits close to home. Just pack up your troubles in your old kit-bag and smile, smile, smile.
Of course a half billion dollar boat is necessary for the world's richest man. The 50 million dollar annual expense of operating the thing is chump change for a man who made 17 billion dollars in one day in 2020. He probably has a lair hidden deep within a dormant Japanese volcano, complete with retractable roof and a goon squad of hundreds to man security for it. 
https://www.bbc.com/news/world-us-canada-57079327
= new reply since forum marked as read
Hoi, polloi.
There is so much secrecy about the building of the yacht, and everyone is sworn to secrecy about the details, all of the workers will be killed at the completion of the project. I hope they are enjoying the time they have left. There is speculation that he ballast will not be lead, but gold......It also has the ability to sail in case fuel oil becomes an issue.....
