Just hypothesizing, do not actually know if this is the mechanism, but it is entirely possible that by storing gold with a broker could allow them to access the

Just hypothesizing, do not actually know if this is the mechanism, but it is entirely possible that by storing gold with a broker could allow them to access the value in order to make other investments. Essentially, having cash as collateral means having it in a bank and subject to these restrictions whereas gold in a 3rd party vault might not be but still give you the same access to credit.