> These sorts of outlooks are notoriously hard to predict

The gut feeling you're about to lose your life savings isn't worth it for a lot of people, when I had most of my money invested it was always in the back of my mind. I cashed out and bought land/started building a multi generational house. All doubts and fear disappeared overnight, I'm for sure losing money compared to going all in on Nvidia or even btc, but I don't need any mental gymnastics to rationalize my choice.