So I asked my friends regarding their opinions and impressions about bitcoin and their answers made me laugh. One of my friends answered:
"Bitcoin? Bitcoin is used for transactions in deepwebs to buy drugs!"

So they think that bitcoin = deepwebs. So they stay away from bitcoin thinking it was illegal
People who only know phenomenal history about it may only know that without really understanding the basic concepts of crypto itself. and that seems natural to people who are actually not interested in the digital payment revolution. but they only see from the process of the price of bitcoin from the beginning until like this. they must be aware of current technology first .