All banks should be fearful of cryptocurrencies and it's foolish if they don't recognize that. They have the power to compete with them in a way that banks are not used to. They cannot simply buy cryptocurrencies and take them under their control due to their decentralized nature.
Cryptocurrencies (like bitcoin) are only a threat for the international wire transfers these days. As long as you can't give out loans in bitcoin without the proper (and legalised) collateral background, it's not as urgent for the banks to handle the crypto story. Also, as long as bitcoin (and the others) are so volatile, everyday people will stay away from them. Mass adoption is a need for bitcoin and for the other cryptos yet, to let all the people know about bitcoin and the possible advantages of them, compared to the current banking system. But as long as scammy ICOs are not regulated somehow, people won't be brave enough to join this party... So there's a lot to do until bitcoin will be a real threat to banks, but banks are really cautious, so they are analysing the current situation, and they are trying to prevent the future losses, so this is why they think about crytos like Bank of America.