American billionaire Bill Ackman, founder of (Pershing Square Capital), whose wealth is estimated at around $8.17 billion, believes that the commitment to not wasting money remains a fundamental principle even after achieving wealth.

Ackman told The Wall Street Journal: "I don't like wasting money. My father was very careful about not wasting anything. If I left the light on in my room, he would get very angry. And today, I still walk around the house turning off the lights."

Although his father worked as a commercial real estate broker, and his family lived in a New York State home worth approximately $56,000, Ackman was raised with the conviction that he would not inherit wealth, which motivated him to forge his own path toward building one of the most prominent hedge fund companies.

Despite his significant financial success, Ackman has not changed his spending behavior, emphasizing his constant commitment to finding the best deals and avoiding unnecessary expenses, even in daily details.

He said: "If I don't like the price of parking, I look for another spot. It might seem funny, but I don't like paying parking fees, even though I once owned a parking company."

He added that his sensitivity to waste extends to simple details, saying: "It really bothers me to leave the gas stove on during the weekend. This has actually happened, and it upset me a lot. I don't consider it an obsession, but it's something I care deeply about."

This approach reflects Ackman's philosophy on managing money, which is based on financial discipline and reducing waste, even in the face of billions of dollars in wealth...