The technical innovation of blockchain is that it lets customers get together and maintain the list themselves, with no banker involved. If I want to transfer 1,000 Bitcoins from my account to someone else’s, there’s no handsy banker to call. So instead, my computer broadcasts the transaction to all the computers that run the Bitcoin network, sending all the other Bitcoin people a message that says, “Hey, I’m transferring 1,000 Bitcoins to another account.”
