The US men's basketball is a money-line favorite over Tunisia at an astonishing -$225,000 (meaning you'd have to risk $225,000 to win $100). This sounds like an awful bet but consider that at 4% interest your single day interest return on $1 million would be just $109.59.
So if you have a million just collecting interest - you could basically quadruple your return for the day by putting it all on Kobe and LeBron. Then pray there isn't an act of God.