The richest prize ever in Powerball History , worth over $1.5 - billion US dollars before taxes , may have gone to a sole winner who bought a ticket in Chino Hills , California .
One self - made billionaire gave unsolicited advice to the grand winner .
The richest prize ever in Powerball History , worth over $1.5 - billion US dollars before taxes , may have gone to a sole winner who bought a ticket in Chino Hills , California , but one self - made billionaire gave unsolicited advice to the grand winner .