The presence of a portfolio indicates implicitly either an unhealthy obsession with the past or a desire to present others with a way of visualizing their own future, newly linked to that of the portfolio’s owner by some creative or commercial bond. Spend enough time working on one and it becomes some of both.
In the past I’ve been open to freelance work in cartography, data vis, and related activities though at the moment I’m finding my time to be scarcer than my money. Perhaps the right project could draw me out of retirement though.