Dirk Müller, aka "Mr. Dax", is a trader on the Frankfurt Stock Exchange.DW-TV: We have a man in the studio with us today who is giving readers what they want. Dirk Müller, a stock broker from the Frankfurt Stock Exchange, is also the author of the book Crash Course. Mr Müller, my first question: where do you make more money, with book sales or stock trades? Dirk Müller: It’s shifted somewhat. I was a broker on the floor for 16 years and within the last month it shifted to being an author and being the link between the financial market and the people outside and to explain to people outside what's happening behind the scenes. That's more interesting to me, to explain to people what's happening so that they can understand what's happening in the crisis.   DW-TV: You are a known face here in Germany. We'd like to show our viewers around the world what it is you do. Yours is one of the most photographed faces on the floor of the Frankfurt Stock Exchange. So much so that your are known as Mr. DAX. You've been with the Frankfurt Exchange since 1992--have seen the dot com fever and bust, post 9-11 fall and of course, the financial crisis. You are part of the machinery that caused the crisis. Do you ever feel somewhat guilty? Dirk Müller: No, not at all. We're all part of this system - everyone who is paying with the money we're paying with, the money with nothing behind, no gold behind, nothing behind, no commodities behind, it's just money...'in God we trust', that's it, we are all taking part in the system and there are a lot of problems with the system and we have to change these problems and it's a very hard and difficult way. DW-TV: "In God we trust": Why should readers listen to what you have to say about the markets when you were sitting in the front row when everything went berserk! Dirk Müller: I explained to people at the beginning of 2007 that there was a big problem coming, a big tsunami on the way...and to get out of their shares, to get ou...