Bitcoin Can Make Banks disappear? Of course not, because bitcoin is not able to completely change the money and as money there will be no bank will also, unless, you are more powerful than governments in each country.
I like to believe that people are stronger then governments and establishment. Banking system exists for a long time, my opinion is that bitcoin is better and if people of this world see as I do we can change this world together.
When people are united anything can happen, I know here we talk about far future but changes are inevitable. I strongly believe that bitcoin is capable for this, one day we will see how people quitting from banks and joining bitcoin, that will be great turnover.