What’s the Fastest Way to Test if a Startup Idea is Worth It? - I will not promote

There’s a lot of talk about MVPs, prototypes, and market validation, but I wonder… **what’s the fastest way to test if an idea is even worth pursuing?** I’ve seen founders pre-sell before building, others launch a landing page with ads, and some go all-in on building first. What’s worked for you? Any strategies that helped you validate an idea **without wasting months on it?**" \- I will not promote