It is not worth selling bounty tokens immediately, iif it is a good project with bright future ithe prize will probably rise. But if you sell them you generally get less profit.
You have a point dude. If we see a bit good chance on the bounty campaign or it's promising bounty then yes it is worth to sell. It is a matter of choice whether to hold it or sell it actually. I have to hold in my case because I still have no idea on what to do with the bounty that I've got. So it's really up to someone's decision.