Some commercial banks, including some investment banks, introduce their own cryptocurrencies for the purposes of settlements and transactions with certain financial institutions and corporations.
Commercial Banks are centralized agencies and they cannot create a decentralized system like cryptocurrencies. Such regulated agencies which wish to utilize the blockchain would still use regulated currencies without the 'crypto' or privacy quality.
And to address the topic title, Bitcoin and altcoins do not need the involvement of financial institutions inorder to gain acceptance.