Want to know what the richest of the rich eat? Well, a father and son duo in the Austrian town of Groedig believe they have invented the world's most expensive food product. Made from rare albino fish eggs and 22-carat gold, their "Strottarga Bianco" caviar retails at a staggering 250 thousand dollars per pound. Walter Gruell, owner of Walter Gruell Fischhandel, showed off the production process for Ruptly.