Apple's iPhone 5 is rapidly approaching its first birthday, so speculation about Apple's next-generation iPhone, dubbed iPhone 5S or iPhone 6, is hot topic right now. Here, we ask whether or not it is worth buying an iPhone 5 now or waiting until Apple launches its new iPhone later this year.Related StoriesHow to watch Wimbledon 2013 on an iPhone or iPadiPad hacker appeals against conviction, 41-month jail sentence