In some areas I think we have but overall, not quite. Yet.

But it's not far off. I think we need to follow that childhood Boy Scout ideal of 'always be prepared.'

I'll add this about buying properties at huge prices rather than in a separate response: buying property that will be gone in a few decades has made a lot of money over the past two decades or so: buy a waterfront or adjacent property and hold it a year or slightly more then resell it at a huge profit. It will be the final buyer that sees it wash way but the original house "flipper" won't lose anything then. I have friends who buy million dollars second homes and ignore the fact- don't dare speak of it! -that in a few years their second home won't be worth the sand it's built upon. One couple I know purchased a beachfront property in an expensive ($1.1 million) in a town on North Carolina's Outer Banks. Its taxable value increased by four-hundred dollars within six months. And after one year they had it demolished to replace with a larger home. Granted, they're in the level of generational wealth that losing it wouldn't be a huge dent in their overall wealth, but they talk about it as something more to leave the kids. With the Atlantic Ocean rising four-tenths of an inch per year- and that rate is quickly accelerating- ten years means, at the minimum, four-inches in sea level increase, enough for a few storms to take out most of the island where they're building their new vacation home. But other, non-rich, people live there and can't afford to move inland, and many wouldn't, anyway.