I am currently studying advertising and PR, but I know that in ten years I could be doing something completely different.

When someone asks you this question we tend to answer "working and with kids".
What if we don´t have kids?
What if we are not working but traveling around the world because you won the lottery?

Of course, we all have a dream job, mine is working at Vogue and I am working hard to achieve it, but maybe in 5, 4 or even this year I change my mind and I want to be a carpenter.
Do you see where I am going with this?

Work for your dreams, but be happy, don´t stress over it, enjoy every small detail of your days, if you are positive and you work hard, you´ll get whatever you want.