You have a point But Sometime Its not only  Bounty  Hunter  who dump the token  investor are part of it . Most Project give out 50% bonus in Pre-sale lets  say you have bought $1000 wealth  of token  and your giving 50% bonus .. as soon the token get on exchange if you are panic investor you will dump it and go  .. Some time Bounty Hunter cheat but KYC can never solve the issue .. sometime the project manager should distribute the bounty  hunter token  on 2 or 3 quarter bases ..i think it can help .