Improve physical delivery capabilities and actual exchange capabilities
First, I'd like to see (and possibly even invest in) Vaultoro enhancing its physical delivery ability. At a minimum, a customer who wishes to take delivery of less than 100g should be able to do so, even if there is extra cost.
Every customer of Vaultoro has some amount of value stored at Vaultoro (even if it's zero). For those who have Bitcoin stored at Vaultoro, Vaultoro could allow them to take responsibility for holding gold and delivering it to other customers near them who want physical delivery. I realize there are other problems that could happen, and my request here is that Vaultoro go to work on solving them. You are in an excellent position to advance the causes of those interested in bitcoin, those interested in gold, and those interested in decentralization. Please don't let the opportunity slip away.