If such question is directed to some of by strict friends and relatives, you'll hear things like;
1) I don't trust bitcoin to be reliable because it's a madness to invest on section where is not regulated because certainly if not today but in future occurance you might need to channel your bitcoin investment complains to a notable authority.
Quite unfortunate for such thought of persons as the case maybe that bitcoin is decentralized.

2) Bitcoin is a scam because finance and assets can't possibly be electronic or software technology and get trusted like the fiats and the stocks that can be physically be handled. Couple with the fact Satoshi Nakamoto the creator of the bitcoin has remained unknown.
Very doubtable and skeptic to those who doesn't understand the potential value of decentelsized and the risk of getting yourself exposed to the public with your bitcoin.

3) It feels crazy and stupidbad risky for someone to invest in a market sector that you can't predict the market.
That regards to the unpredictable volatility of bitcoin future price which also as the case causes market sentiments amongst investors and also investors with the experience of Fomo.