The Bank of Canada is developing the digital currency version of its Canadian dollar, called the CAD-Coin. The initiative is intended to allow the issuance, transfer and settlement of central bank assets on the distributed ledger. The thought behind this is to build a private pool of cash as a collateral, that would then be converted into the digital currency, allowing an easier exchange of funds while maintaining more data and security over these transactions. It make sense to test the waters on a private blockchain, but it seems that these private networks will need to be able to "speak" with each other down the line in order to maximize the real value of the blockchain.