I knew bitcoin way back 2010, I just don't have the initiative to study about it back then. If I was the same as you, I would be a millionaire by now. :v
Okay going back to your survey, I have answered it accordingly. Too bad the study will be written in Slovene which I do not know. What is the scope of your study? Focused only on the security and safety, or does it cover other topics as well?
It is focused on the safety of the system itself, potential attacks on the network and the use of bitcoins as a preffered way of payment in deep web black markets.