Yes it is naive, yes there are dozens of warning signs.
People buying more are just in denial, it's a psychological mess you are in already. If you are right about this and have invested already, move on. You invested already. If you are right you win good for you.
If you are wrong as all signs suggest, investing more is just insane. It's just an illusion that you have created. "You are investing you have not lost yet", "you are investing it will help the stock go up", etc, etc.
You need to face the reality that you have lost some with this. Don't go lose everything with this.
