Psychological drives could be tied with human nature, in a sense that people can become slaves to it, which makes it a conduit to be used for manipulation. Same could be said about fantasies in a way, fantasies are things that people wish would happen, if someone could promise a person that their wildest fantasy can become reality then that person could easily fall into the trap of manipulation. lastly, investments when not tracked can be means for manipulation because the thing you "invest" in could require more for you to put in in order to keep it going.