‘Cache’ is the first of the three pillars of financial freedom outlined by the authors of Your Money or Your Life Vicki Robin and Joe Dominguez.
It refers to the skills you have which save you money.
These skills may include the ability to cook. To grow your own food. Perform maintenance on your car or computer. Cut your own hair. Or even, skills you can swap with others. Some of your artistic skills may fall into this category.