why this Block-chain is different from banking ledgers ?
Banks and accounting systems use ledgers to track and timestamp transactions,
The difference is just a blockchain is completely decentralized and it is an open source.
This means that people do not have to rely on or trust the central bank
to keep track of the transactions. The peer-to-peer blockchain
technology can keep track of all the transactions without
the fear of having them erased or lost......
Which becomes quite a different story if you look at coins that have anonymity features. There it is much more difficult if not impossible for the public to do all the verification.