For me you can make money on crypto by combining different types of gift campaigns like social media campaigns, translation, creative and signature. I suggest you do a review but I am more likely to focus on earnings in the organizing committee's campaign. 
I agree with your opinion, we can earn money by joining a bounty campaig like signature campaign, blog campaign, translation campaign, twitter campaign, facebook campaign and there are many ways to earn money in crypto, which is important we must be active in doing the task which is given by the bounty campaign project.