A copy-paste AI prompt: 5 investor personas as a 'shadow advisory board' to kill bad ideas
bigaiguy · x · 2026-10-22
A copy-paste prompt for Claude/ChatGPT turns the model into a "shadow advisory board" of 5 investor personas that critique your startup idea:
- Peter Thiel (contrarian): monopoly vs commodity, 0→1 insight, can it reach $1B+ without competition?
- Naval Ravikant (leverage): does it have code/media/capital leverage? Will it make you rich or just busy?
- Warren Buffett (fundamentals): where's the moat? Can a 12-year-old understand the model?
- Plus a YC partner and a skeptical VC persona
The author used it to validate a SaaS idea last week; the panel's takedowns ("vitamin not painkiller," "no leverage," "big tech will ship this in 3 months") saved him 6 months of building the wrong thing.
Related event: Shadow Board of AI Investor Personas to Stress-Test Startup Ideas(3 posts)→
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