What are the highest-EV ways to go deeper down the Beeminder rabbit hole?

I plan to resolve this using my own judgment, as Beeminder cofounder, but I'll be influenced a lot by the betting itself. I.e., this will be resolved somewhat beauty-contest style. "Highest EV" refers to expected value. Like something that probably won't work but would be huge if it does still has high EV. Related market: https://manifold.markets/vlad/what-life-improvement-intervention [OOPS this was to be a free choice market! Re-creating...]

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