The question how many bitcoins do you have, what does this answer mean "None but already have"?, it's confusing. I wish you good luck in your master thesis, dont forget to post the result of the survey here.
Oh it was to make a difference between people who don't possess any Bitcoin anymore (loss of wallet, reselling all...) from people who never have possessed any Bitcoin ^^'
Because the [0;1[ can have like 0.00001 Bitcoin still left!
Is it more clear if I say:
None , and I have never had ? It's sometimes hard to translate something from French to English, it sounds weird
Yes I will post the results and the screen of the donation to the WWF! ^^