http://gamrconnect.vgchartz.com/thread.php?id=196903&page=1
This one definently took a lot of foresight, but this is probably my best prediction ever. The prediction was that the XB1 would sell 30 million before the Wii U sold 15 million. Now keep in mind this was 2 and a half years ago (far before the Wii U was discontinued), a time in which even this prediction seemed totally impossible and at a time that the XB1's future was still uncertain. I'd say I did a pretty good job with this one. So what was the best prediction you've ever made.
Edit: I found this as well: http://gamrconnect.vgchartz.com/post.php?id=7007691
Made a bet with LipeJJ and HylianYoshi that the XB1 will reach 30 million before Wii U reaches 15 million. Loser has to get avatar picked by winner for 6 months (or if I lose, either 6 months avatar control for both Lipe and Hylian, or my patrick avatar comes back forever).