Is it better to work as a manager and move up or to study a bachelor of business?

Basically I got into the Bachelor of Business at a renown university with 90% graduate success rate.

However I may be getting promoted at my current job that I've been at for the past nearly 10 years.

is it better to be a manager at my job or to study a bachelors?

(I want to travel for job so which is better - experience or certificate of completion)

Is it better to work as a manager and move up or to study a bachelor of business?
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