Because of the recent migrant crisis, it is okay and safe to travel by trains in Europe. I heard that trains between Germany, Austria, Czech Republic and Denmark are too crowded and sometimes canceled.
I also heard that some euro zone countries (Germany) have imposed temporary border controls. Has anybody traveled recently?.
To narrow down the question, I am planning to take a train to from Hungary to Germany (Berlin) and then to Denmark (Copenhagen). I hold a valid residence permit issued by Hungary.