if you specify in sth, of course you will have good potential in this field, but it also means, most likely you will be limited here
if you know all things but no specified field, of course you are able to handle a lot of different job scope, even help you collegues, do you know that employer likes employee who can be multi-task at one time and always willing to help others? so still got promising future, but price is - may not be able to develope in the field you like
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