How to stop others from copying your idea

It is a foolproof method that works really well. But first, a question. How many of you actually work on your ideas? Because, if you haven an idea and you are excited about it. You need to work on it. Because if you don't, somewhere else, someone else will. I believe in divine intervention, if there's something that needs to happen. It will happen. Either through you, or someone else. I have worked on multiple ideas throughout my career. I took out time for them apart from my job. None of them worked out. But I don't feel guilty, because if I wouldn't have tried, and if someone else would have succeeded by using the same idea? Well... I can be a jealous person sometimes 😝