Yes, the Broncos should play football, because there is no rational reason for them not to. They are a football team and I don't think they are losing the most games or considered the worst at what they do. Even if they were, someone has to be the worst team in the NFL.
The broncos are one of the best teams in the NFL this year. With Peyton Manning they seem to be a favorite for the super bowl. They are on a roll and will continue their success unless another team steps up. Peyton has done a good job of leading them so far and doesn't seem to be slowing down.