되지 않을까 and 되시길, what do they mean?
-가 되지 않을까 (The full sentence is 열심히 노력하신다면 감동을 줄수 있는 배우 내지는 아티스트가 되지 않을까)

-가 되시길 (The full sentence is 우리 대한민국의 자랑스러운 인재가 되시길)

I met something like this and I dont know what it means. Can anyone pls explain it?
Arghh, I always have problem with any sentence has -되 in it

Question

되지 않을까 and 되시길, what do they mean?
-가 되지 않을까 (The full sentence is 열심히 노력하신다면 감동을 줄수 있는 배우 내지는 아티스트가 되지 않을까)

-가 되시길 (The full sentence is 우리 대한민국의 자랑스러운 인재가 되시길)

I met something like this and I dont know what it means. Can anyone pls explain it? 
Arghh, I always have problem with any sentence has -되 in it

Answer

In your sentence, "-가 되지 않을까" is used to mean that "I think you could/might be....(someday in the future)", and "I hope that you will become/be...." for "-가 되시길(바랍니다)"

\^o^/

لا تفوّت فرصة تعلّم لغة جديدة وأنت مرتاح في منزلك. تصفّح مجموعتنا المختارة من مدرّسي اللغات ذوي الخبرة وسجّل في درسك الأول الآن!