What is the most useful thing you have read or watched about investing that actually changed how you think rather than just confirmed what you already believed.
Everyone has read The Psychology of Money. Everyone has watched the same three YouTube channels. Looking for the thing that genuinely shifted something. A specific chapter, a paper, a post on a forum somewhere, a conversation that reframed a concept you thought you understood. The stuff that is harder to find than the obvious recommendations. What is yours and what specifically did it change?