Many times, this has happened:
- I have a cool idea to make a thing.
 - I do not act on my idea.
 - Later on, someone else has the same idea.
 - They act on it. They make it happen.
 - The thing is successful. The person who acted on it gets notoriety and/or money for it.
 
This is not a weird scenario. I’m sure it’s not unusual.
What’s weird is that when it happens to me, I get angry at the other person and not at myself.