It's actually the opposite. You always build for yourself or someone comes to you and you build a product for him. Because that shows a real need. That's also

It's actually the opposite. You always build for yourself or someone comes to you and you build a product for him. Because that shows a real need. That's also how it worked for my product I'm very successful with (I built it for myself). If you try to think what other people would use and build a product around that you will most likely fail.