the sky is the limit
US /ðə skaɪ ɪz ðə ˈlɪmɪt/
UK /ðə skaɪ ɪz ðə ˈlɪmɪt/

1.
there is no limit to what can be achieved or done
:
•
With your talent and dedication, the sky is the limit for your career.
•
Our new product has been so successful that the sky is the limit for future growth.