It really depends on how banking and government perceive the need for an alt-right dark currency, to by-pass credit controls and taxation.
For example, why go to the trouble of creating an all new type of currency
to buy say MJ from a store-front or online? Just create a MJ cooperative bank of dealers and producers and customers, and use a simple and reliable debit-card. Governments, business and bankers and FED and stock market all have methods of accounting that entail 'off-books-accounting'.
That's the 'real-time' present Dark Currency Flap. Kick the Deficit Can down the road . . . as Money defies Gravity . . . it trickles UP!
You cannot hack Bars of PMs, but shadow established digits can be, unless Quantum Entanglement clear transmission coding is established.
SING keeps with the automated-buyer-pre-approval purchase idea and that's where the true value is? Governments and banks will probably never OK anything that they cannot get a fee on.
The beauty of Block Chain is others on-line get coded message that your transaction was accepted (a user verification method that increases currency transfer acceptance).
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