I don't think that Bitcoin make banks disappear, because already banking services support the Bitcoin's currency nowadays to get converted easily into cash and fiat, and also Bitcoin isn't yet used like banking services

Yeah, the time is not far away that these banks will sooner adopt bitcoin and will start to work with bitcoin, as in the future everyone will prefer bitcoin and banks have to survive, so they will easily adopt it.

This means all russians that has or think to get bitcoin will be forced to use or to exchange it from other way besides the bank,soo western union may be the way .

Bitcoin needs to be more powerful to replace banks, and that is not possible at a moment, as banks are the most trusted organization and people don't trust bitcoin.

That's depend really with the usability of Bitcoin worldwide. Nowadays it's not going to happen even in the nearest future because banking services are already used a lot more than Bitcoin , but if Bitcoin's currency conquer the world there is a possibility that things change

It is hard to say that, but many people need their banks and there are also a lot of people that dont even know what Bitcoins are so you must fix first that problem.
If it is more used and more people know that, than you can talk about it but not now around this time.

Bitcoin has the potential to replace the banks, but it will never be able to replace the banks. It is simply because the government won't allow anyone to do so as they like fiat more than digital money. Well, one day it could. Who knows?

Bitcoin doesn't have the potential to replace fiat it's impossible. Its ecosystem is too vulnerable to drastic changes overnight and no one in their right mind would want this to be the main currency of their country. Let Bitcoin be a great investment vehicle and buy your groceries with banknotes in the local supermarket.

its just like guess the future,its hard to answer is bitcoin can make bank disappear,because until now we have not find any bank with bitcoin payment,lets hope someday in 2020 his is will happen. or maybe bitcoin was not exist.