Sometimes it defends to bounty managers you trust, in my case case I am loyal to my bounty manager. If the project almost gone I try to make private message with him to ask what is the new project,luckily he answered  .After that try to read the details of the ICO if it is alluring that's the time you decide.In choosing the right one it defends on you or it defends how you study the ICO or the project.