-value is generated by labour
-because money is represetative of value, it allows people to hoard value.
>As the production of commodities further develops, every producer of commodities is compelled to make sure of the nexus rerum or the social pledge.  His wants are constantly making themselves felt, and necessitate the continual purchase of other people’s commodities, while the production and sale of his own goods require time, and depend upon circumstances. In order then to be able to buy without selling, he must have sold previously without buying. This operation, conducted on a general scale, appears to imply a contradiction. But the precious metals at the sources of their production are directly exchanged for other commodities. And here we have sales (by the owners of commodities) without purchases (by the owners of gold or silver).
If selling is the trade of use-value with exchange-value represented by money, then to say that selling something to a miner isn't selling is wouldn't either mean that
A)mining doesn't generate value, even though it's human labour Post too long. Click here to view the full text.