I remember several years ago similar poll was made and i was surprised most of the users answered NO.
In case your answer is still NO, I'd like to know what is your main reason not to own one bitcoin?
EDIT2018:
In 2017 it was 51% YES / 49% NO.
I'll leave voting open and since we are no longer in 2017 I'll change the subject to "Do you own 1 Bitcoin?"
Nope. I own only a fraction of a bitcoin. 0.006 to be exact. But that's hard earned and even if I don't even reach a whole bitcoin in 2018, at least half of a bitcoin is a good concrete plan. That's a really great challenge for bitcoin investors this 2018. Have everyone race towards 1 btc and they'll get 1 btc after.