One idea: Investments in mitigation and relocation. New York for example will build an estimated $10B sea wall to protect Lower Manhattan. Areas like Southern Florida, New Orleans, parts of the Bay Area will likely become uninhabitable before the end of the century.
There's a small island in the Chesapeake Bay that is a favorite place for us to stop when traveling back to Annapolis. It's the unfortunate canary-in-the-coalmine. Here's a short video that talks about their problems.
I am told that yen and euro are way below historic prices for decades, I once out of pure luck invested in an Australian bond which paid over 4% and sold just before its collapse at a 30% return when converted back into USA dollars (about 9 years ago).
Soros did his billions on the British pound bet decades before...wonder if something similar is brewing in about 6 months?