Nice investment that has been. Looks as if the only boats that depreciate are the cheap boats.
Once you have the money, there are many ways to make lots more.
Buy an ultra expensive yatch, use it for a few years and sell it for a multiple of what you paid. (Cheap boats don’t apply).
Or buy a limited edition super car, pay a few million up front. Enjoy them for a few years and then sell them and make a nice profit.
Not always as clear cut with real estate, but probably the same in today’s environment.
Above a certain level, you are breathing rarified air.