This can cause a chain reaction. Banks from other countries will also join this game in order to keep up with pioneers like German bank. That's when the fun begins when other bank start making such statements at the distillation.
I can agree that a chain reaction might happen but our expected chain reaction aren't going to happen because some EU countries are definitely going to resist this one unless all or the most influential banks in each EU country would adopt bitcoin but if they're the big opposers then they will probably have a hard time.