You are conflating the general use of the word asset with the specialized meaning with in finance. You can't sell your education back for currency and you can't

You are conflating the general use of the word asset with the specialized meaning with in finance. You can't sell your education back for currency and you can't put it on a balance sheet. You could and people have tried to make derivative securities to commoditize people's educations and then you could try to literally sell your education (or more like future returns on your work based off your education) but until you do that it's not a liquid asset.