Morel really chose the best option.
Chettu is all about speed and reflexes. He does and probably wants everything fast. And his special power is all about showing his speed and having his opponent killed while trying to catch him.
But the downside to his power is that its duration is up to 8 very very long hours to a superfast guy like him.
I bet waiting that much will have him go crazy, and Morel can remain on defensive mode without losing much energy during that time. Should he try to catch Cheetu, he'd deplete his forces quickly and might become vulnerable. And since he does not have enough power to exit that closed space or create an attack strong enough against his oponent, having a long nap is the better choice really.