The works of Beethoven or greatest chess games of all times could only exist in electronic format as well, without affecting their value.

The fact that the value of something is abstracted away from actual physical entities doesn't (by itself) make it in any way inferior.

Quite the contrary - it's the ability to grasp the concept of virtual value, rather than only recognizing it in bananas etc. that makes us human.

(Sorry about the English, that's a tad too abstract for my working command of the language :/ )