It is up to you with your concern about your privacy and safety. The more people know what you are doing, the more risk that your privacy will be leaked more. It can affect your safety too, and if you are worry about privacy and safety of your fund and life, just don't tell anyone about your investment in Bitcoin.

2025 is different than 2009, 2010 and Bitcoin is mentioned widely on media, so if your family members hear about Bitcoin but don't invest in bitcoin, it is because they don't like it, don't believe in future of Bitcoin.

It is up to them for learning about Bitcoin and change their thinking on it.