Whether Ouyang Nana's decision to give up the cello and enter the entertainment industry was worth considering many factors. The cello was a very artistic and cultural skill that could help people better express their musical emotions and thoughts. On the other hand, the entertainment industry was an industry full of fame and wealth, attracting countless young people to chase their dreams. Everyone's pursuits and choices should be based on their own personal interests and values. If Ouyang Nana was passionate about the entertainment industry and believed that she could succeed in this field, it might be a good choice for her to give up the cello and enter the entertainment industry. However, if she was not interested in the entertainment industry or thought that she could not succeed in this field, she might need to reconsider her career plan. In short, Ouyang Nana needed to weigh and judge whether her final choice was worth it.