Exchange of course plays a role, but you do not forget that many, but almost all bounty hunters sell coins as soon as it comes to the exchange, thereby bring down the price of the coin to the floor. And investors in such moments begin to panic and then sell the coin. In the end, receives a coin that has no value to keep her.
on big exchange bots make liquidity, so bounty hunters cant dump price
Now in general, Bounty Hunters sell tokens immediately for a small price and there is no more growth in the future.