Few investing situations feel better — or more stressful — than owning a stock that has doubled or tripled.On paper, it looks like a clear win. Your capital has worked hard. Your patience has paid off. Yet instead of calm confidence, many investors feel a creeping sense of unease.Friends tell you to “lock it in,” headlines warn that markets are overheated, and the fear of giving back gains quietly takes centre stage.But selling just because a stock has gone up can be as dangerous as holding blindly.Let us b ...