Recently, I came to read this news
https://protos.com/spanish-police-rescue-crypto-investor-kidnapped-on-holiday/The first thing that came to my mind after reading this was that one should not talk about his crypto investments with strangers or friends as it can pose various risks. If you are active on forums like bitcointalk and involved in trades, you should not give information which can help others relate to your identity.
This applies not only to the BTT form, but to any forums and discords and telegram chats popular in our time.
Also, many people forget that being in public places, for example, in a subway car or bus, when you look at the screen of your mobile phone, check portfolio or when entering a password, the curious eyes of a neighboring passenger can also look into it. You won't even notice it. And remember that in some countries for urban security there are high resolution monitor through which personal can see what is on your smartphone.