I am not sure how aware are you of Spain's political and social situation. Not being a fully "Podemos" supporter I think is something is going to stay around for long.

People are tired of corrupted politicians after years of crisis and them not fixing anything, and just being perceived as stealing money... Podemos appeared in the exact moment to take that momentum and is getting support from people everywhere: students, middle-age people, elderly people... Don't think they'll win the 2015 elections but they'll play an important role for sure.