Try to estimate the elevation above sea level of this house.
Why buy a house that will very likely be under water, I mean in the non-financial sense?
If it is going to be a civilization-ending force, wealth won't matter and all properties (and even the very concept of “property”) are at risk.
Your question makes more sense if the conditional is changed to “if climate change is going to have little effect on society at large but severe, highly localized effects... ”
Will the species go extinct or would communists take over?
Property—at least real, as opposed to personal—property seems to be unlikely to survive as a thing in the absence of civilization, even the species survives, and “civilization-ending” was the scenario being discussed.
> Will the species go extinct or would communists take over?
Well, species-ending would be compatible with civilization-ending, but not necessary to it. Ideological communism probably wouldn't survive the end of civilization, either; the problem it addresses would no longer exist nor would there be means to implement most forms of it, nor would any people that survived probably have much energy for theory.
"A civilization is any complex society characterized by the development of a political state, social stratification, urbanization, and symbolic systems of communication beyond natural spoken language (namely, a writing system)."
Even in most post-apocalypse antiutopia science fiction, all of these attributes are present except perhaps urbanization. E.g. a roving gang with a warlord at its helm has a political state and social stratification, and they would still have access to pencils.
That's the key one for real property (well, settled agricultural society probably more than urbanization per se, but if you have one you probably have the other.)
> E.g. a roving gang with a warlord at its helm has a political state and social stratification, and they would still have access to pencils.
But probably not have a system of real (as opposed to personal) property. Which is my point.
Even if he's made more since then, 10-15% of your net worth definitely isn't peanuts.
Not to mention being as high profile as he is, and talking "my legacy this and that", you'd think he would have paid more attention as to what kind of message he's sending by doing that.
"Parts of Martha's Vineyard are only feet above sea level today. Recent projections target Edgartown as the first town to submerge.
In less than a hundred years, you might be strolling down South Water Street in a kayak. A hundred years - nothing in geologist years. In fact, it doesn't seem like a terribly long time in our years either."
Some conservatives (those with a libertarian bent at least) have long noted that government bailouts as flood insurance has been a moral hazard allowing people to live cheaply in places they couldn't afford to live in otherwise.