Signature campaigns are very handy to earn an extra dime but if you want serious money/bitcoin. You should develop some service which is new. Then promote it good by social media and banners. If you can make that work you will earn more money, because easy tasks, is easy money and boring.
I think certainly the easiest and does not make you feel boredom is that you work in accordance with what you enjoy doing, such as working on your hobbies, such as you liked with art or design, you can make a sale of services to graphic design, there may be some people who will hire your services? its the easiest job