Yes. I want to stress this some more. I know several people who are/were working on big ambitious projects in a kind of stealth mode, citing concerns that their idea will be stolen, or emphasizing that it isn't "ready yet". I suspect this is usually rationalizing a fear of criticism.
A single-person personal project shouldn't be worked on in isolation for more than a few months. You'll lose perspective. Feedback is extremely valuable. It'll help you grow your idea, and it'll help you abandon something that's not going anywhere. (The same probably goes for small teams.)