There are a few reasons why ski jumpers might wear gold helmets. One reason could be that the color gold is associated with success and achievement, so wearing a gold helmet could be seen as a way to show off one's accomplishments. Additionally, the shiny metal surface of a gold helmet can help reflect sunlight and keep the jumper's head cool in warm weather conditions. Finally, the color gold is also very visible from afar, which can be helpful for safety purposes if a jumper happens to fall during a competition.