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?
Yes, I have more than one bitcoin but it's not just sitting in my wallet, I have invested it in a few investments like ICO tokens, some altcoins which are potentially the best investments rightnow and their price will rise in a few years.