Good point Namelus!
My plan is actually to use my skills too as “value” when times come, and good thing is that you can not lose them, and it can be traded many times.
I am nurse, and I store a LOT of drugs (meds) in all forms, and knowledge how to use it, so it can be combination of knowledge and physical items that make together really good trade “offer”.
If you actually know how to make stuff, it is one more level up.