Credible doing what? Writing blog posts about college squash? Tell me anything trading related that VN has *ANY* credibility in. Risk management? Arrogance? Trading acumen? Blowing up? Posting arrogant comments about 'dumb bears' in 2007? Should I go on?
Most of the images on his blog are not him. I imagine he chooses a particular image because it represents the theme of the post.