It looks like 58% off but when I crunched numbers it plays out to about a 16% annualized return for 5 years.  That's still a good return for the time frame but I, too, am curious about how to physically take delivery of gold and what kind of security would be involved.  A nice thing about trustless transactions in blockchain is that you don't typically have to trust who you're doing business with, but when dealing with a physical commodity, and particularly a high value one, like gold, paying attention to chain of custody, physical security, and insurance are no longer luxuries but become essential.