And cheques do not have any value except for the amount being transferred, since the cheque itself is made of paper and relatively valueless.
However; there is a major flaw in his logic and that is that cheques are in essence limitless in supply, and therefore relatively valueless, while bitcoin is limited in supply. The more users that want to use bitcoin to transfer wealth, the higher the demand for the limited supply of bitcoin is.
Therefore; bitcoins' value does increase with the amount of wealth being transferred between parties.
Furthermore; cheques cannot be re-used, while bitcoin is re-usable, increasing the value of bitcoin even further.
Warren Buffets cheques would be more valuable as well if they were limited in supply and re-usable!
Logically this implies that Bitcoin is a currency, not a check (cheque).