For me money is a token of trust. The value of it simply is a derivative of the trust.
So the more you trust your ten dollars, the more they can buy?
Isnt it self evident?
But on a serious note you dont trust the dollars they are the token of your trust to economy, society, that the commodities you buy are up to your expectation, your employers will do their job etc, or if you like that god will not end the world tomorow
Money depending on trust does not mean its value derives from that. Instead, it derives from the proportion between the exchange value of all commodities and the amount of money available to express it.