They are excellent business people and investors because of their intuitive and psychic ability and their creative forward thinking mind, they are able to predict future trends.
Other people can lean on and depend on cancer, they will listen to people's problems and help them however they will rarely express their own deep feelings to anyone.
People who want to share deep emotional thoughts and opinions with a Cancer might feel that the scales are tipped on one side for cancer will rarely reveal it's true deep feelings.
They are easily offended and will sulk and wallow in self pity for a long time when they get hurt.
It is difficult for cancer to open up and have a close emotionally fulfilled relationship with someone because they are so closed off emotionally and physically to the world.
This is because instead of doing this for themselves, they project this onto other people.