Immediate sea front properties are out of the question. Same for low lands. Forest covered or at least shrubberied hills, outside of but somewhat higher than most port towns, are looking ever more enticing.
Bill Gate's San Diego beach front home: https://nypost.com/2022/03/23/bill-gates-is-turning-43m-mans...
Obama's home on the coast of Martha's Vineyard (an island in the Atlantic): https://vineyardgazette.com/news/2019/12/04/president-obama-...
Humans are really good at ignoring problems until they come to a head. Even when that happens, they try to bargain around it - just look at flood plain insurance.
The problems of climate change will disproportionately affect the poor. The rich will be fine, and their purchases will reflect this.