Will a donor who is not currently widely known in effective altruism, longtermism, or existential risk give ≥$50 million to longtermist or existential risk causes or organizations before the end of 2024, and be expected to continue giving ≥$50 million per year?

I will only count donations or grants, not impact investments. I will count something as a longtermist if it seems like the kind of thing the Long-Term Future Fund or Open Phil's longtermist budget might plausibly fund. I will resolve this question at my discretion in whichever way seems most correct to me. I may trade in this market, but promise to carefully make sure not to let my position affect the way I resolve this market.