Blockchain is going to be the digital bank . Bitcoin is a digital decentralized currency in which the transactions take place a peer to peer transfer without any third party or bank . To ensure the authenticity and to prevent fraud Bitcoin transactions are verified using cryptography .
I think there are already countries wherein their banks have been accepting bitcoin already.But for me,i'm not really looking forward for it to happen since the blockchain itself is already a digital bank.We already have our own wallet with our private keys so banks would still be useless because most of our money are already secured in our own wallets.Let's just keep its security as always.