The business you pitch should be large and difficult. I know it will be expensive to build, I want to know why. Most things die. I want to know if you know how yours does, and whether that knowledge is load-bearing.
Not the idea. Ideas are cheap.
Not the market. Markets are visible to everyone with a browser.
Not the plan. Plans are stories about a future that doesn't exist yet.
I'm buying the specific configuration of what you know, what you don't know, and what you're going to do about the asymmetry.
Why you. Not why this is big. Not how someone could win. Why you, specifically, will.
"Because I'm smart and will figure it out" is not an answer.
If the answer involves the shape of your own knowledge and its edges—what the money becomes when it enters that specific gap—then we should talk.