Well !! We can't do something about those countries that will ban it but the adoption of bitcoin is keep on growing everyday many countries are starting to adopt bitcoin so this scenario of seeing bitcoin being used to buy all things is there and it's visible at the moment.
I read carefully the whitepaper to set a potential gauge for the coin. If there is an ICO, the results are a good indicator of the future success of the company. I also assess if the route map is realistic. I graduate my investment according to the results of the first stages of the project.
A bank is the place where money and gold are stored and controlled. Its principles can't be replaced by mere money. But , what i think that will happen in the future, is that the banks will start storing bitcoin and try to control it.They will recognize it.
Existing fiat currencies are controlled and manipulated by Governments and Banks. Do you think these people are going to just let Bitcoin exist without their involvement or blessing?