We may have to have a discussion on what represents an "investment" Penn.
For an investment - there needs to be a yield ... and, on this topic at least any yield needs to be from outside the "square". Any yield from inside the "square" definitely cannot be termed an investment ... not unlike investing in Lotto each week.
As for Capital Preservation ...well!!
Suffice to say, please don't think purchasing loo paper as making an investment. Stick to PEB!:p