Not Really Something New

Wealth = {choices + mobility}.
That equation has probably been true since at least the rise of human agricultures (plural intentional).
But an interesting playing out of that calculus is underway in the Miami area. 

"Taking the High Ground—and Developing It As sea levels rise, investors in Miami are buying up land with higher elevation, sometimes displacing low-income residents.

http://www.theatlantic.com/business/archive/2016/03/taking-the-high-ground-and-developing-it/472326/

BTW: If you live in the Miami area, check out http://eyesontherise.org/app/ , an online app by Florida International University to help you visualize the changes. As in the graphic above.

and, Once in a lifetime