You might want to help people, produce a product or a service, and maybe make some money – whatever it is, between here and there sits a gap.
What does the customer want?
What do you think the customer needs?
Both are great questions and part of the process of customer clairvoyance before making an offer. There are also some logistical questions that any project needs to address.
But perhaps the question worth asking as a freelancer has nothing to do with the product, service, or even money made and everything to do with you;
Who is it that you are trying to bring forward?
Understand the person; understand the project.