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.
The image I saw in the Op's link was very painful because now that Bitcoin is not legal in our country it has to operate with a lot of secrecy. Otherwise, we are in danger because Bitcoin is a completely confidential matter, so you can't discuss Bitcoin with someone who doesn't know about Bitcoin or whom you don't trust. You may get into trouble. When you trade in Bitcoin you must keep it completely confidential and if Bitcoin was legal in our country we wouldn't be facing this problem.
If you have to hide your hands after buying bitcoin, then don't talk about bitcoin wherever you are. As long as you are in the jurisdiction of any country that prohibit bitcoin, then don't play with fire with it. You shouldn't force yourself to buy bitcoin for any purpose if your country's government doesn't allow you to buy them legally, it's too risky to do.
You can buy and own bitcoin even if your country forbids you from buying them, but if you want to play it safe then don't talk to anyone about bitcoins until your country's government legalizes it. Regarding the privacy of your financial or investment assets, it is clearly your full responsibility.