I'd be curious to see who they surveyed. All I can find is this:
...according to a survey of 2,068 participants commissioned by Finder.
14.4% of Americans seems awfully high to me. I wouldn't be surprised if the results are skewed because the respondents weren't representative of the population. Some demographics will definitely have a higher propensity to use Bitcoin -- Millennials, internet users, etc.
of owners are they? Real users that use their bitcoins as currency or are they only speculating that the price will increase next year and sell to hold fiat?