Who can guess and guarantee one good bounty or not. Because most bounties are initially good, they can turn out to be bad after it's finished and vice versa. This is the need for you to make your own decisions when you want to be part of the bounty. so that we don't blame others when things happen in the future.
Thing is bounty hunters are looking for a project that they can sell their reward at an ICO price, even higher, unfortunately there is no such bounty like that anymore for now, due to the market is has been struggling especially for the altcoins market.
You are right, due to the market the price of many altcoins going down after listing, bounty people are selling those coins for low prices due to because many companies failed to develop the real product what they mentioned.