Before I started my company the people closest to me told me it was never going to work and I should go to law school. I started it anyway. It was successful. When I first bought bitcoin everyone laughed at me. I bought more. No one laughs anymore. When I got married my father in law told me I was being too aggressive saving money and I needed to lighten up and enjoy life or the marriage wasn’t going to work. He got divorced 2 years later, I am still happily married. After the birth of my second child, my wife had a serious complication and the doctor told us we’d never have more kids. We had two more. The same doctor delivered them. The things other people say/believe are almost always about themselves and their own hang ups and insecurities. You can safely ignore them.