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Bitcoin is not going to supplant governments or bring down the banks. But as the hype around the digital currency subsides, banks and entrepreneurs are trying to use bitcoin in ways that could revolutionise the banking industry. The FT's John Authers reports from Sibos in Boston.

► Authers' Note: http://bit.ly/1Gj930D

► FT World News: http://bit.ly/1Exp0iJ