Let's start with the fact that just after almost a year and a half not many can earn money on bounty, and this is a very ungrateful job. I think this year the situation will not change, and it will be still difficult to make money on bounty.
Definitely, bounty hunting is one of the ungrateful job I have ever seen so far in my entire existence in this world. People spend so much time on bounty campaigns to help promote the token sale of the bounty project and later, they will not get paid. Even when they are paid, the token given to them are sometimes worthless. I wish bounty hunters could just ignore bounty campaigns whose payments are in their native token. But I'm hoping things are gonna change before 2019 ends. Trading and investment are currently the best way to make some amount of money on cryptocurrency in 2019.