The possibility of this is very low and almost impossible. Governments are being controlled by banks and global elites. It will be more than just a war before banks will dissapear. Look at what happened to the people that oppose the central banks and drop the dollar reserves. They died in vain even tho they only mean what is good for their people. We can barely scratch the banking system. I'm not saying that there's no hope but let's accept the fact that this will be harder than hard. Because as you can see even Bitcoin replace the fiat as a 💰, Bitcoin will be money too and banks will appear again. This will be a never ending cycle unless all the greed's and desire of wealth to everyone of us is remove.