http://www.factor001.com/

It's a sharp looking ride. The engineering and attention to detail is interesting and fun to read about...
But, no it is not the worlds most expensive bike. For that title, I ask that you check the Aurumania Gold and Cyrstal Bike.

http://www.aurumania.com/#

It's a bare bones single speed with no brakes, for the wealthy urban cycling hipster.