Hyderabad, July 21: Heroines who enters the film Industry in the 20s, will not be able to stay here for a long time, believed Rakul Preet Singh. She says that it s a great opportunity to be a heroine at an early age and after 30 years it is difficult to continue as a heroine. Yes, there are few heroines like Anushka and Nayanthara who are running successful career despite their age...However, only a few of them will be having that opportunity. She also added that there is no particular limit for her cine career and she will continue, till the audience wish to watch her. "It doesn t matter that for how many years we are in the Industry, it is concerned that, how many good movies we have done," Rakul added.