Cultural chameleons

Do you think working abroad is essential for a successful career? Why (not)?
In my opinion, working abroad is a great opportunity to improve your proffesSional life, but IT is not essential to get a successful carreer.
I think life and work abroad has a lot of advantages: it's a good option to improve your CV, it's the best way to  learn a foreingN language, and it's a time of your life that can give us YOU a lot of personal and proffesSional experiences.
Many people say that it's a waste of time, but, I don't think so.
In conclusion, working abroad can be a positive experience.