I am one who holds cash. Not all, but not an insignificant portion either. I have a mixture of assets. Why not invest that cash? None of the investment opportunities that I see fit my risk profile. Example: I'm holding my stocks now, but I do not plan to buy more.

The average middle class (and below) person in any highly developed country has a mixture of assets, dominated by their house and cash savings in a bank. Most don't directly own financial assets -- stocks, bonds, etc. However, they are invested in a pension (national or private) that will certainly invest in financial assets.