Since, ones mindset can be changed, it's better for one to develop a growth mindset towards all one's activities in life to achieve a great result. Develop a growth mindset toward all your goals today to improve on your business, studies, etc.
Both mindsets will earn success( one step away) but those who have a growth mindset, and the meaning itself will tell us that there are more improvements happen than those who have a fixed mindset. But of course, a fixed mindset can be changed if they are open-minded and if they are looking for more opportunities. But either of the two we belong if we don't work hard and no action is taken, nothing happens.
Mindset + action = success
Mindset + no action = fail