The issue focused on whether anyone could buy and sell shares in Facebook - or how much its shares could trade for.What has happened in the past week is really interesting but this will have little impact on my daily businessCarsten HonlingSome investors had argued that those holding shares would get very rich - more than $25bn in total - if Facebook itself went public. Now it appears that most people - including those making money from Facebook itself - will only see an initial investment of $10.After almost four years