Kevin O’Leary still likes shopping at Walmart: ‘I’m always looking for a great deal’

Billionaire Kevin O'Leary still shops at Walmart for household essentials. He believes saving money is crucial, regardless of one's wealth. Warren Buffett and Ingvar Kamprad also maintained frugal lifestyles throughout their lives. Lucy Guo, a newer billionaire, embraces the FIRE movement and seeks…