He sounds pretty angry when you hear him talk about Wall Street and traditional FIAT monetary systems that way. Didn't Overstock have some problems with sales, as well? I mean Amazon is pretty much the market leader anyways!
He is angry. He is a very interesting character who is one of the few CEOs that is an outspoken critic of Wall Street. There was a cool article about him a while ago, let me find a link.
http://www.wired.com/2014/02/rise-fall-rise-patrick-byrne/Yes, Amazon is obviously bigger than Overstock, but I've started to use overstock more because not only do they support bitcoin, but they also treat their customers and workers very well. Not to suggest that Amazon doesn't, but Overstock has been very highly rated for employee and customer satisfaction. Here is an example
http://investors.overstock.com/phoenix.zhtml?c=131091&p=irol-newsArticle&ID=1503943&highlight=