First of all thank you for your answer, I want to tell you that I am just a student searching for some information for my diploma thesis. My questionnaire does not require your personal identification or email address but only some information about Bitcoin. Anyway thanks for your reply.
I just filled your survey and good luck with your thesis. and also you should join some group of telegram or discord that discuss about cryptocurrency world. there's lot of community out there that give you much answer about crypto world