While I do not like the idea of governments telling people how to spend their money at the same time this is a great opportunity for bitcoin and cryptocurrencies in general, people do not like to be told what they can do with the money that they have spent so much effort earning and if the German government is going to do something as dumb as this then it is likely that many smart gamblers that are aware of the existence of bitcoin and that did not adopt it for some reason or another will take the opportunity to do so now.