Each house in a birthchart represents a specific area of life. The 2nd house is related to material possessions, one's values, self-esteem, earning power and spending habits to name but a few. I remember when I first learned about this concept, I thought it was strange how these unrelated themes are strung together and put into the same house. Afterall, what has money got to do with personal values?
Through my work, I have learned that confident individuals are able to 'sell' themselves well, hence it has a positive effect on their earnings too. Furthermore, according to the law of attraction, you attract what you send out. Therefore, an individual with a healthy dosage of self-esteem is able to value oneself and can project one's self belief onto the external world.