In my country in Indonesia, of most people only a few know how to invest using digital money, the rest they invest their money such as, Land, Houses, Gold, Rented Houses, they are reluctant when I tell you to invest their money in bitcoin, because there are some problems than before, there were many gambling products under the guise of trading, that's why many people don't believe in digital investment, here I understand that knowledge is more important than the lust of someone who wants to have instant money, that investment has risks in each field...
It can also be understood that land, houses, gold and silver are pre-existing things, real assets that we can touch, hold and need to use every day. In contrast, bitcoin is a virtual currency on the internet, with strong volatility, so people are afraid to invest. People tend to prefer safety over risk, only a few like taking risks to make a difference investing in bitcoin. Ignorance about bitcoin is the cause of their fear of bitcoin.