They are not going to accept BTC... I asked that one last year.
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I dont think there can be realistically a decentralised system of buying and selling PM....In a distributed sense of linking value to the chain.
Physical is physical and needs to be delivered. If it is not delivered it is centralised ...somewhere.
That is what is wrong with all the paper being written by the Big institutions..... They write naked paper, and are not good for delivery...they trade expiry and option dates.
(there are enough paper options in existence at any one time for many hundreds/thousands of tonnes of more gold than ever dug up.)
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If I was a customer of yours in another country.... and possibly you were one of mine... I can see a ledger of assets being open and accountable between the parties.
(this could account for PMs...and what UNex distributed vault was about)... but we had no business selling to us or us to them...at the time of the idea.
It is what I can see Etherum or NEM or NXT being able to do.
Contracts between decentralised parties...for sale or storage of a good or service.
Enforcable with multisignature.
Somehow I need to get a business online so I can get into this future.
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Telling Mom and Pop that the digits on the screen is alternate money....that is different to the governments digits on the screen... I just dont know.
I love the blockchain.
Mom and Pop love the government.
I dont know how the masses will be converted without big brother
a) outlawing
b) confiscating
c) taxing the crapper out of it.... too many big old institutions to fight.
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I am quite happy to be proven wrong.
The blockchain and distributed ledger is an idea whose time has come.
It will (is starting to) change business all around the world.
 As far as the coins having value in themselves...i just dont know...pieces of a ledger yes..
The ledger needs to be the desirable thing.... then the coins have value.
Now how do we link value to the chain?
Answer this and we all retire with full boots.
Tacktic.