Am I wrong for wanting to keep things to myself?

When I (20M) was younger, I would talk about my plans for the future and stuff like that, but as I've gotten older, I wouldn't speak much about my future plans. It is mostly because I would talk about them without taking action on accomplishing them, so I thought if I keep my mouth shut and keep my plans to myself, I'd actually accomplish them without anyone's approval. What are your thoughts on this?