It's really up to who's that person want to be: employer or employee. If we all can think that we can inspire others, we can take risks or we can be rich, etc then taking the huge risks but enjoyable journey of being an employer, otherwise, taking the safer routine of being employee.:)

Interesting question, Thao Linh! I think not anyone can learn the nuts and bolts of running a company. That's why there are differences between business owners & employees :)

Hi Thao, This is the first time I am trying to answer a question in Advisors section, hope that help you something on you question.
We all know that people are define by their characteristics and that define the type of jobs or position on the job that you work. ( as you mention being boss or employee )
All over the world, a lot of recruitment using a type of psychology test to get the right people for the right position base on their human nature.
That call MBTI - "Myers-Briggs Type Indicator", they define people by 4 dichotomies
Attitudes: Extraversion (E) - (I) Introversion
Functions: Sensing (S) - (N) Intuition
Functions: Thinking (T) - (F) Feeling
Lifestyle: :Judgment (J) - (P) Perception
The result we have 16 possible psychological types.
The 16 types are typically referred to by an abbreviation of four letters—the initial letters of each of their four type preferences (except in the case of intuition, which uses the abbreviation N to distinguish it from Introversion). For instance:
ESTJ: extraversion (E), sensing (S), thinking (T), judgment (J)
INFP: introversion (I), intuition (N), feeling (F), perception (P)
And so on for all 16 possible type combinations.
To take a free test and know more about your self, you can go to this and take some test.
http://www.freembtitest.com/
http://www.humanmetrics.com/cgi-win/jtypes2.asp
In VNese you can check out this link:
http://www.mbti.vn/trac-nghiem-tinh-cach-mbti/
Feel free to take their test in Vietnamese but be warning that they are going to charge you 15,000vnd by sms, so to save some bucks, you can take the test in enlish and read the result ha ha.
In conclusion:
The answer for your question is Yes and No :D
How?
Take the MBTI test :D
Why NO?
MBTI will help you to know who you are, what are your strong points, weak points. When you know that as long as you want to, you can change yourself and for sure it's take time :)
I had took several tests and my result are around ENTJ and ESTJ - quite fit for characteristic and positions that I am working now.
In pass I am more like ENTJ but now it's seem that I more likely be an ESTJ, i think.
interesting ha ... :)

you are who you think you are

I think each type require different skill set. For example: Owner love taking risk, usually are opportunists, good overall management skill, good ability to make decision and take full responsibility for that decision etc.. while employee have more discipline, deeper industry expertise, better at process and team work, etc. Each skill may be learned but I do believe people are born with different characteristics and therefore will have different tendency. Find your tendency and take the courage to follow that, in the end you wil be happier.