When you already profit, it's already a good sign to sell your bag. Don't hold it for too long, there are consequences to it like the price could be dumped by users who hold more coins than you. If you are holding a reputable project though, you have the option to just keep holding until you need money for an emergency. I normally do that later option because I can just think of it like its just there on the wallet while I'm also busy with my dayjob.