I'm 21 and make up to $280,000 a month reselling sneakers. I don't see my friends much and still live at home.

Robbie Cartwright, a 21-year-old entrepreneur, makes up to $280,000 a month reselling sneakers online. He started selling items at age 11 and began reselling sneakers around age 14. Cartwright rarely sees his friends and still lives at home. He was late for his own 21st birthday due to work commitments.

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