It is true that the most commercial banks position their non trading balance sheets in a manner that appears to be set to take advantage of falling rates. These positions sometimes include derivatives.
A closer examination of these positions reveals that they are intended to "ride the yield curve", betting on low volatility and profiting from the positive carry and duration decay. Banks are obliged to report the risk to their prudential regulator. Rates have to rise very fast indeed before these position become unprofitable.
All this is well known in the market. I don't see a potential financial disaster in there that might advantage the price of gold.
