If I'm a coach being pursued, I only move if I feel like I'm selling high and leaving a job where it'll be tough for me to meet expectations for the long term.
A smart coach will find a way to beat the axe. Fedora at USM was a great example. He knew he was at his peak, and he started shopping his name. He got UNC to bite on the rumors his agent was floating. Now he hasn't ever done anything at UNC, but if he would've had a 10 win season this year, he would've been smart to leave from there to get another gig.
If you're meeting expectations and can continue, and the pay is good, you stick around.