According to this link, Sir Alan Sugar is worth £800m. Is that how much money he has? http://www.mirror.co.uk/news/uk-news/rich-list-2012-where-do-the-celebs-chart-811206
Markus Persson sold his computer game Minecraft for 2.5 billion dollars (link below) so is he richer than Sir Allan Sugar?
http://www.belfasttelegraph.co.uk/technology/top-notch-minecraft-creator-markus-persson-sold-his-25bn-stake-to-microsoft-after-one-tweet-31044600.html