You might be a writer, a graphic designer, an online seller, or anything else, you will earn better only when you are an expert in your chosen niche. Specializing in a specific area allows you to build expertise. When you are an expert on a certain subject, you have a high chance of getting hired. For instance, it is not enough to be called a writer, you also need to have expertise in various writing fields, such as business writing, tech writing, health writing, finance writing, etc. When you are an expert on certain niches, it will open doors to higher-paying opportunities.