"You go to work, you spend $15 on a sandwich—what are you, an idiot?" Shark Tank's Kevin O'Leary shared some brutally direct financial advice with his viewers in a September TikTok video. O'Leary took aim at two everyday habits—your pricey lunch breaks and coffee-shop splurges—that quietly drain thousands from your wallet each year. O'Leary argued that making coffee at home costs around $0.20 per cup, compared to the $5.50 many people regularly spend at coffee shops. And then there's lunch—another major culprit. “It costs you 99 cents to make a sandwich at home,” O'Leary said. Yet, according to an October 2023 survey from ResumeBuilder a whopping 71% of office workers buy lunch at least three times a week, with nearly half spending $20 or more per meal. O'Leary said that many individuals, especially those starting their careers in metropolitan areas with an annual salary of around $60,000, waste $15,000 each year on "stupid stuff." While a few coffees and sandwiches might not seem s...