Same question that was boiling in my mind while reading the post but glad Coyster made some enlighten explanation. The question now is whether we are to avoid joining any form of conversation through links or we should be the one to host the meeting in a case like this.
I think it's best to just have your portfolio stored away safely in another PC asides from your work PC that you regularly use for business communication. I read the full story via the Twitter link on the OP and Alex(the guy whose money was stolen) even admitted that he goofed by not keeping only the amount he intends to trade with on the computer he likely uses for work and was used to communicate with the scammers.
I think it was brave of him to speak out. I know a lot of people who are OGs in the crypto space would keep mum due to the embarrassment but in his own words,
If my loss prevents this from happening to even one person, then it wasn’t all for nothing.