I personally think the main reason why bounty hunting is not as profitable as it used to be because of the market conditions which is making it hard for ICOs and projects to raise money for their project. Trading is a really different thing and it is not every body that have the knowledge of trading which is why most people are still participating in bounties.
Aside from the market's condition, the main reason why it isn't profitable at all is because the project is not possible to happen. Their goal is not near to the truth and at the end it was a scam. Trading is a different thing. We handled it, we drive it and it all depends on how we incorporate some strategies to become profitable at the end.