DGX could suffer a similar crisis as Tether (USDT) if they fail to provide regular audit reports as to the quantity of physical gold held in vault storage. I assume that you have already considered this. (I myself found Proof of Provenance in their FAQ). Would it be worth your time (and your audiences) for you to analyze the audit report (or summarize your analysis)? Since their first audit report is dated July 5, and audits are to be performed quarterly, isn't one overdue?
All the same, digital proxy gold is very exciting!