The life of an actor is an interesting case study, and this is mainly because, he lives a life where he has to lie every day, and be someone he is not. He's loved by many, but not for what he is, but for what he portrays. He adorns make up, and says lines that have no meaning to what he is, it only is his means.

There arises the insecurity, he think whether he can have this all the time, because he changes, market forces changes, new people come in, it would be time to move on.

There is no easy way out of this, the only way is for him to detach himself from all the glamour and glory, and seek himself, and know himself and what he is.

You need to know that acting is not life, that it's just a talent. That it's something that can go with a small scar. So take a deep breath, and live? live as yourself.