Well to be honest all of the bounty token should be tradeable,
But for some reason some of them wouldn't be in the market because the developer or the team is leaving the project,
They just took the money of their investors .
Your opinion is correct, I also have several different types of tokens in the wallet where coins cannot be traded because of the things mentioned above. I only give advice in participating in the bounty campaign. first, check everything regarding the project to be run, I hope you follow a good project and have a future so that the prizes can be sold.