I also heard that they have also heard about bitcoin before, but they don't know anything other than that. However, the introduction of bitcoin is now widespread, and most people already know what the real price is but probably don't know how to use it. However, education is still needed to make people like that realize how valuable bitcoin is today.
Bitcoin is gaining popularity but still there is large number of people that are yet to be introduced to bitcoin. The question posted by OP just confirm this thing that there are people who are absolutely ignorant about bitcoin. If you ask anyone here on this forum that 100$ or bitcoin then majority will opt for bitcoin. Its because majority fully understand bitcoin. Those who don't know bitcoin think that fiat is the gold.