Afraid of bitcoin and virtual currencies in general? I don't know anyone personally who's like literally scared of it. Maybe banks.

Probably just like what most people said in this thread, older people, or more specifically, non-tech savvy people. They probably just couldn't grasp the technicalities on how a currency could exist without a company/organization controlling it. It honestly would be very difficult to explain to them how the transactions work, mining, the blockchain in general, all those stuff.