“The National Australia Bank (NAB), one of Australia’s ‘Big Four’ banking groups, published a three-page research paper on 19th December titled ‘Bitcoin to replace AUD?’ (Australian dollars). Despite the provocative title, the paper does not suggest replacing the national currency with bitcoin, nor say it could happen in the near future. Rather, it is an explanation of bitcoin and a comparison of the nature of digital currencies with existing sovereign currencies, and how they fit into the current international financial system. Bitcoin could well become a widely accepted medium of exchange, the paper said, but it would take many more years to achieve mainstream acceptance.”
http://www.coindesk.com/australian-bank-report-bitcoin-replace-dollars/