Bitcoin, as far as I understand it, can never work like the MOTB, because the payment system described by the MOTB is actually the opposite of Bitcoin. Think about it this way: the MOTB requires the store or whatever to scan you and deduct the money from your account, whereas Bitcoin requires the person to *send* the money to the store.
Sorry for the bump of a old thread but came across this topic as Bitcoin became a discussion at my Men's Christian group.
While I agree with the post above mostly, another issue that was brought up on another site, was the fact that the new Bitcoin ATMs require that your palm is scanned for verification and to "prevent" money laundering. It palms scanning or scanning of the eyes get worked in during regulation of Bitcoin by governments then this could line up with the Bible verse very nicely