Bounty hunters work to earn coins and make sense if they will sell the coins they earn. And I think this is inevitable. But not completely blame the bounty hunter, you should also look at the actual condition of the project. Maybe because they don't have a good strategy in developing the project.
All projects if it has an excellent development, if the price decreases, surely the price will be back up. It may be noteworthy also for those holders with a large number of coins, such as investors.