What future can bitcoin have if more and more countries will ban it? As of today, Russia added itself to a list of countries that ban bitcoin operations.

So is there a future for bitcoin (and other cryptos) if more countries are going to ban them?
Let's imagine a worst case scenario where bitcoin becomes illegal in all countries. If you put a bitcoin address on your site, you'll get shutdown. If you run a bar and you have the bitcoin logo saying that you accept bitcoin, you'll get fined. Online bitcoin exchanges will be made illegal everywhere.

Even if all this happens, bitcoin as a technology cannot be uninvented. All of this banning will just slow down the adoption. You'll eventually see it uprise again and being used in closed communities worldwide. 

People will find other ways of converting fiat currency into bitcoin using decentralized exchanges that go through anonymized tor networks. Local bars and shops will adopt systems where you'll be able to pay your coffee, wirelessly, anonymously, through a hardware bitcoin wallet, without even having to scan a QR code. Paying with bitcoin will become untraceable, ubiquitous and unstoppable.

It's simply a better technology than the current monetary system, and in my opinion history has shown that better technology cannot be stopped no matter the regulations or the policies against its adoption.