Personally, I'm hedging my bets by living lean and investing every spare dollar while I'm making hay at potentially unsustainably high wages. I'm also continuing to develop myself professionally, and preparing to move to a lower-CoL country in the future if that ends up making sense. If everything goes well, I'll have the option to retire young and rich. If the world goes pear-shaped, hopefully at least one of those measures will turn out to have been a good investment!