Support is building for changing part of bitcoin's design, after two high-profile developers introduced an alternate version of the virtual currency aimed at speeding up transactions and future-proofing the digital money.
Some of bitcoin's biggest backers, including BitPay, Blockchain.info, Circle and KnCMiner.com, wrote a letter this week in support of the existing version of bitcoin—but only if it adopts some of the central ideas proposed by the renegade developers, Gavin Andresen and Mike Hearn.
