Banks will not be replaced by Blockchain as they are running from decades, there are chances that banks will adopt Blockchain for people's interest. Banks have gained a lot of popularity across the world and Blockchain still has a long way to go, well every countries national bank should a green signal to make it go. I feel small banks will give more prior to this in future.
Agree with you banks are now adopting crypto now as it has more security features than banks we can easily keep our investment save in it. Block chain was first only for crypto but after more improvements now banks also has started to use this technology and it made banks safety even more clean and easy.