Personally, I believe that you always have to approach people with limited trust. Not only if we are talking about investing in cryptocurrencies, although it is true that the world of cryptocurrencies is specific and in this case you need to be especially careful. I consider the case described in the article cited by the OP to be extreme, but it certainly gives food for thought. Nowadays, dominated by social media, it is increasingly difficult to take care of your privacy, and unreasonable dissemination of too much information can bring us trouble.