Well it has many case scenarios but one that we should understand is how everything works in this world. First regulations can not be implemented just right away all over the world. There hundreds of countries using Bitcoin and every country has their own set of rules and also they have their own decision making power. For example it may happen that what Germany think might not be right in the perspective of England or US. In similar ways it is highly impossible that every country will apply the same rules. Even with the experience of G20 meeting where India did brought the Bitcoin regulations, it doesn't mean it has been overruled everywhere. In fact there are countries on the other hand like Arab's who are adopting the Bitcoin in whole new perspective, similar goes to the Japan also.
So is it possible bitcoin will get affected? Yes, definitely it will get affected but there will always be one part of the world that will be taking it in positive way so Bitcoin will continue to thrive. It's all about the balancing and due to decentralization it has slippery roads.