It's a matter of understanding the technology, having a hard time to purchase for the early majority and the fear of losing your investment due to volatility as well as all the FUD traditional monetary industry is sending out.
Germany is no different than most of the countries except the knowledge of the currency by many people so far and also the struggling when they remember the hyperinflation the country suffered after losing the first world war and not being able to pay for the depth having the german mark not tied to the gold.
Even though that is kind of far away for all living germans, it happened only at the begginnign of the XX'th century and I am sure all germans remember that period from their history classes.