Ask HN: What's your biggest success–or failure–using AI?

Curious what real-world wins (or faceplants) people have had using AI tools.

Have you used AI for…

Trading crypto or stocks?

Making big business or product decisions?

Automating workflows or building side projects?

Generating content that went viral (or flopped)?

Anything else that changed your trajectory—for better or worse?

Would love to hear stories, tools you used, lessons learned, and whether you'd do it again.