No. Blockchain is a technology while bank is an organization. They can't replace each others.
Well said bank and blockchain are different, blockchain is the technology and on other hand banks are the organisation
That's true... But still I see so many blockchain projects that want to perform the work of banks, different projects can be responsible for different functions, like loans (Home Loans project, for example) or credit cards (Amon, etc). But government won't support this, as it's the decentralization itself.