My first thought about this thread is that it's about bitcoin trading, like, the literal trading. But it seems like you meant about earning through bounties. But the last sentence made me confused again. Regardless, I assume you are referring to bounties.
It is hard to earn through bounty hunting. There are very few promising campaigns but has bunch of bounty hunters.
If you have any service that can offer here, you can try that. Like, if you are a designer, Social Media Manager, etc.