This one bulletin point party is and will be irrelevant. But it got the media in Germany all dizzy, because some right wingers also want the Deutsche Mark back and therefore AfD is Hitler or something. Also it is dangerous, naive and have I mentioned Hitler?
The newest representative poll by Forsa asking if Germans think that their money is safe in bank deposits had 54 % of participants answer NEIN. Which is still a significant increase from the older polls (a week earlier!). This is in my opinion very irrational. At the moment there is no reason to believe that in Germany. The more important question is: will the citizens act? Will they start to get their money out of the Euro area? I hope not and I don't see a reason why they should. The German banking system is very diverse, with only one bank too big to fail and many trustee savings banks that have a state independent guarantee for deposits in place.
So, the new party might just become a threat in the sense, that Merkel will take a harder stance in case another bailout will be necessary before the elections in September. The significant growth of the AfD and the different approach of the media, might just get the party into the Bundestag then. It will not be part of a government coalition, and it primarily decreases the chances of the smallest Merkel partner FDP to be in the next Bundestag, since a lot of former members have switched to the AfD