Ask HN: What do you do when someone else executes your idea?

A couple of weeks ago I had an idea for my next app. It was very exciting for me because I usually have trouble coming up with ideas. After a couple weeks, another company released an app that is strikingly similar to what my idea was. And they executed it quite well. That's not to say that I don't think I could do a better job, I do. And I think this could motivate me to make my app even better than it was going to be. But I feel that the worth of my idea has gone down now that somebody else has already make it. Should I still make my idea, or should I abandon it now that somebody else did it?

Thanks for reading,