This is my concern, honestly. Madoff is a perfect risk example everyone coulda-shoulda seen from the outside but trusted from the inside until the collapse.That may seem less of a hassle BUT it also means there's no verification they have the amount of gold/silver they claim to have.
The Madoff ponzi scheme went on for decades.
So imagine you bought $1M worth of gold as a retirement and figured you'd just use it up slowly as you made purchases. Then 10 years later your card gets denied after you've spent ~$500K. You contact the holder of your gold and find out it was a ponzi scheme. They used half of your gold ($500K) to make your payments and they stole the other $500K you gave them rather than buying $1M worth of gold.
Not saying this is likely but if they're not regulated, what certainty do you have they're holding your $1M in gold?
Also, in my younger years I had crossed path with unsavory characters whose entire existence was based on scams, which made them excessively cash rich. I'd learned that their biggest project was to lease vaults from under a reputable stock exchange and promote themselves as a non bank, secured vault for gold deposits. Their intention was simply to wait a few years, empty the vault and disappear....I don't know if they ever succeeded, only that they had to leave Europe quickly.
But, assuming it is not a scam, the reason I shared this is because clearly, before BTC or as a result of BTC, some in the gold industry devised ways to turn the metal into a alternative payment method, not so much as a way to bypass government regulations and taxation (although the latter may be), but as a way to stem inflationary pressure on currencies, also a primary goal of the Bitcoin community.
From my understanding, the holding entity isn't storing gold bars but gold coins, purchased/traded around the world. I really don't know how the payment mechanism works, but they clearly have to track clients expenses against their gold holdings. They must also have charge limits and approval thresholds. I don't know what their processing charge is, but the last 10 years inflation has been atrocious while gold has shot through the roof so if this is legit, it's an interesting proposition.
