In freelancing, there are no trends that apply to the entire job title. Trends will be different for different categories, sellers, and levels of dedication. Looking for trends that will guarantee success is the wrong focus for this kind of job. Figure out what skills YOU have, and what skills YOU can offer to others who need them, then, build your freelancing career around those skills.
There are no easy roads to success, and there are no trends that will guarantee success. Your success will be directly proportional to the work YOU put into the presentation and marketing of YOUR skills.