There is a connection. I will give you an example. 1xaur can be melted for 1g of pure gold. The price of 1g of gold is 40$ that means that minimum price of 1xaur is 40$ and no one would not sell it below that price. If gold increases to 80$ per 1g... after that we have bigger lowest price. That's why Xaurum is unique investment.
But why can not I get gold for the tokens?
Of course you can. That is the point of Xaurum. You can whenever you want directly exchange Xaurum for gold. This procedure is called melting. There is more than 43kg of physical gold in total behind of all Xaurum.