to be really frank, when I use to hear about bitcoin before joining the forum, there used to be this feeling of complexity attached to it and I never knew it's a simple thing that doesn't really involve much complex analysis before one can invest into bitcoin. I guess that's possibly the reason why some persons are afraid to invest in bitcoin because they look at it as one complex stuff that they will needd to take a whole bunch of time studying before they can get the basic knowledge that will guarantee proper investment
all new things are certainly very scary for some people, especially if it is related to money, bitcoin is still new to the ears of the majority of people, in fact i rarely find people who actively talk about Bitcoin in crowded places,
People find it difficult to accept new things especially because they involve the risk of losing money. I've had Bitcoin through its first decade, so I think you'll find it easy to explain something good about it regardless of its usefulness and potential value growth in the long term.
Sometimes someone doesn't believe in bitcoin, not because they don't believe in it completely, but it depends on who explains it and how you explain it. I mean, rich people who are involved in bitcoin investments are likely to be trusted more by someone who doesn't understand bitcoin than you who are just starting out. That's a reality in the real world, I have to admit.
bitcoin is not that scary, bitcoin will never make people lose if they don't panic sell because they fall for FUD, bitcoin will continue to exist and be profitable if you take advantage of opportunities through price fluctuations.
You can't guarantee that 100%, I mean how can you guarantee they won't lose if they don't understand how to secure their wallet from potential hacking or anything else? Bitcoin is not just about how you earn profits, but also about how you can keep your wallet safe.