Many people do not understand the basics and working principles of Bitcoin, which may lead to distrust and caution towards cryptocurrencies.
The cryptocurrency market is very volatile and prices can rise or fall significantly within a short period of time. People worry that their investments are at risk.
Not only about less knowledge of understanding Bitcoin principles and crypto market, but people are also afraid because they hear too many FUDs. It leads people to distrust BTC or crypto as a whole.