i think The most spreaded one is to be paid with bitcoin when you made some work. For example if you are coder you can easily find work with the new projects which born every day in the world of crypto. Then you can earn bitcoin if participate in various ICO-s which these startups made to have money to develop their project. If you are able to chose the right project the coin offered at these ICO-s will increase in value in time. Then you can earn some bitcoin even participating in signature campaigns that these startup organise in the time of ICO-s....