I suggest you go a different route. Your presentation will be historical data and anecdotal, It will look better than a random survey conducted on forum. Which you should also point to, the various degrees of privacy individuals are comfortable with. Bounty participants wouldn't think twice about giving you all their personal data, but they would also skew your survey by only making up a small portion of crypto users.

I suggest you just post your survey here as a topic with a list of the questions you'd like answered - even make some of it a poll using the options if you want. Anyone interested will come here and post their answers and/or opinions without leaving more information than they'd like. Then you can search through the topics that have been created on the forum, showing you how and when people would like to use their crypto for purchases.

Good luck finding what you need, but I think you will be better served trying a different method.