It's complicated again. Trouble is that you have the potential to miss out on opportunities. i.e. before I start a project in the electronics space, I mention it to my friends who are interested in electronics; they then have the opportunity to say, "Oh here's some information I found earlier" or "here let me help you with that"; in various ways that you don't get to take advantage of if you secretly hide all the things you do until they are done.