It's pretty hard nowadays to come up with a brilliant unique idea that has never been implemented before. I'm not even sure it's possible at all. Competition me

It's pretty hard nowadays to come up with a brilliant unique idea that has never been implemented before. I'm not even sure it's possible at all. Competition means there's a market and customers willing to pay for a product. This is a validation of your idea. Now, unless you're shooting for the unicorn status, there's a pretty good chance you can build a good product, compete and get enough customers to make a living. You don't have to be the best or the cheapest to compete and you don't need hundreds of thousands of customers to make a living. In the end, i think it really depends on what you're trying to achieve: unicorn status or small side project that you'll enjoy working on and might someday become a full time job. Either way you should try to do what you love, or if that's not an option, to learn to love what you do. That way, even if you don't succeed, your time won't be wasted and will be spent doing something you love.