I am personally a bounty hunter and have been working for about a year now. I have been able to hold all the coins which have been awarded to me. I think there are a lot of bounty hunters out there like me who are keeping hold of their coins. I don't push the blame on investors alone though. But no one should blame bounty hunters only.
Yes you are right mate, not all bounty hunters will easily dump their coins but there are many also holding their coins and keep waiting for the right time prior to sell for profitable investment. So in this situation theres no responsible or to be blame who could make the possible dumps of crypto market trends.