We keep coming back to the topic of writers, and it would appear they make more money than most people assume they do! The good ones definitely do. The internet is still expanding, with billions of websites, blogs, and pages being updated every day. Someone has to come up with all that content, and it's usually a freelance writer. The key strength of a freelance writer is their versatility; they might be required to write about any topic, so they have to be able to research it in the space of a few hours and then set to work writing about it as if they're an authority on the subject.
Freelance writers can earn great rewards for the same reason virtual assistants can; they're not tied to any individual or company. They'll have several 'go to' clients and then occasional one-off pieces of work from elsewhere. Even newspapers use freelancers for features occasionally - and you don't need a single qualification to do it!