Everyone must have fear. Many things cause the fear of someone. But in general, the emergence of fear because people dare not take risks.
In doing business, the cause of fear here is the risk of loss. Everyone must be afraid of failure, so some people avoid business and some prepare to do business.
Another cause of fear is death. People fear wild animals, for fear of death. This is one example, there are many other cases. Fear of death causes people to fear doing something they perceive as danger.
Another cause of fear is shame. For example, people do not dare to speak in public because of embarrassment, fear of speech is not good and so forth.
Another cause of fear is trust or religion. Case in point, Muslims do not dare to drink alcohol for fear of sin. People do not dare to do freely for fear of sin with their Lord.
Cause of fear due to trauma. Trauma can make people afraid to do something. For example, people do not dare to marry, because of trauma with the marriage of her parents who often bicker.