A Gallup poll conducted three months ago suggested that less than 0.5% of US investors “will probably buy Bitcoin in the near future”.
Bitcoin: we don’t expect new highs in 2018
Tuur Demeester
6.1K14

Seems like a pretty weak poll to me. I would say probably more in the 5–15% range, although it may be more as soon as cryptocurrency comes a-knocking again.