[markbnj]

> However, that would be the worst thing I could do for society, because I would be removing that resource (whether it has intrinsic value or not, it is still a resource) from society.

I think the author would say that the pile of money under your mattress is not a resource, but rather just a pile of tokens that represent an ability to acquire resources in the future. If the author's view is correct then keeping it tucked away under your mattress has no net positive or negative effect: it just sits there. The exchanging of valuable resources that produced the tokens happened sometime in the past.