In the future a significant proportion of knowledge workers won't be salaried employees of individual companies, they'll be full-stack freelancers managing their own portfolios of income streams:
We’re witnessing the rise of a new kind of worker: the Full-Stack Freelancer.
Full-Stack Freelancers respond to technology as an opportunity, not a threat. They leverage software-as-a-service and online platforms to vertically integrate a “full stack” of capabilities, instead of focusing on one narrow function. This allows them to capture a much greater percentage of the value they create, instead of giving it away to gatekeepers and distribution bottlenecks.
Full-Stack Freelancers are responding to a series of technology-driven trends — contingent employment, intensifying globalization, and automation — by taking advantage of the other side of the coin: technology finally becoming powerful enough, cheap enough, and user-friendly enough to be deployed productively by a single individual.
They borrow freely — from tech startups, digital nomads, lifestyle designers, independent contractors, the sharing and peer-to-peer economies — but placing them squarely inside any of these categories is not quite right.
That’s because Full-Stack Freelancers manage a portfolio of income streams, not a job based on one set of skills. source