 I lost my company $250,000 because I forgot that I'm not the user. Oops. How many times do we jump into designing a solution without placing the user at the forefront of the problem? Too many. So how do we know that our hypothesis and assumption are correct before diving into building the product? Well, we don't. I learned a lesson the hard way. I co-founded a Web3 startup in 2021. We ran on assumptions. We shipped fast, rounds and rounds of internal iterations and finally showed our customer the fourth version. Seven months later and it completely flopped. We produced a vitamin and not a painkiller. We raised and burnt $250,000. We officially ceased operation in 2022. Just like that. Avoid my mistake and remember that you are not the user.