Robert Kardashian passed from esophageal cancer in 2003, when Kim, Kourtney, Khloé, and Rob were still young, yet their father made sure his kids would be financially secure for a long time. Per Trust Advisor, Robert left each of his children a $100 million estate in trust at the time of his death.

Kathie Lee Gifford, a longtime friend of Kris Jenner, said that the family still struggled financially before "Keeping Up with the Kardashians," the reality show that catapulted them to fame. Now, the Kardasians are some of the wealthiest people in Hollywood, with Kim estimated to be worth $1 billion.

Kylie Jenner was also (controversially) dubbed "the youngest self-made billionaire ever" due to the success of Kylie Cosmetics, though her net worth has since declined to $700 million. Khloé, Kourtney, and Kendall are also millionaires; most of Kendall's fortune comes from her modeling career.