It is because bounty hunters dump their coins after they received it.
Not only because of bounty hunters we should not Blame them unwantedly because I believe main reason for this dump is due to people whoever invested on presale and team whoever joined as freelancer to that project.
When there is growth you will be praise the coin worth for sure. I see the bitcoin value grows and this token will be grown bigger in the marketplace soon.
The market of cryptocurrency fluctuates in a very strong direction, which makes investors worry and accept to sell their coins at low prices. In addition, the sale of ICO in the private sale period also caused the decline of coins when traded on the Exchange.