It is not paranoid, It's a prevention to avoid bad things that may happen to us. You cannot say a harmful statement to your friends or random people that can lead to losing your asset or losing trust from others. Especially if you are in a country that still cannot legalize crypto. Telling much about your crypto assets may trigger people to not trust you again as they may think you did an illegal activity. On the other hand, we don't know that there are people who become intending to steal or hack your crypto assets. Except you are a rich person like Roger ver, Vitalik, Charlie Lee, then you can hire private guards to protect you at any time. But if you are an average person, you can't do it.