People are afraid to explore cryptocurrency because of the volatility which makes it risky, ordinary people who earn only enough money to survive daily won't take the risk of buying bitcoin because of no assurance that they can earn money from it.
The second reason might be lack of knowledge, even though they haven't experienced yet invest in cryptocurrency, they still keep on judging cryptocurrency as they think that most of it is a scam, and some just do not mind research to know whether the knowledge they have to bow is enough to judge bitcoin.
I think that many people are afraid of bitcoins, only because they have never encountered them, because almost all people sit in their comfort zone and do not want to open up to something new ... Bitcoin is of course something intangible and it is a digital asset, in order to believe in him, you need to get at least some benefit from him ...
Yeah, just like normal people, when we haven't tried yet a certain thing then we feel being afraid because of being uncomfortable, that is also what some other people feels about cryptocurrency.