Between "Rich" and "Happy" which one you pick? Why? What does "Rich" and "Happy" mean to you?

Surely Rich i will choose. Because Rich means Many.

You are rich because of your parents, brothers, sisters and relatives
You are rich because of your friends, relationships.
You are rich because you have very faithful staffs
You are rich because you help lots of people
.......

And now, you don't choose Happiness however, Happiness always knock your doors. Please open your heart to welcome them.

With me, depending on whom you are and what road you are going on. For example if someone is a business man he may choose rich, with the rich he may have a good place in society, he may expand his business more and more , he may become the famous person. And with someone is already rich and has children always frighten together for his wealth, he may choose happiness. And with someone is on the way to improve themselves, he does not choose happy or rich, he receives all thing come to him.

in my opinion , every one desire a happy life but why people always think about " how to be rich" then how to make their life happier?

You can be both - it is matter of perspective. You can have a lot of material goods and feel poor or have very few and feel rich. Same with happiness - you could have more happiness than anyone could imagine and be unhappy. It is has more to do with wants. If you want little you will feel rich. If you are selfless, a state most religions seek to achieve, you will be happy.

I'll choose Happy because I think "Happy": Win to works, sweet in urfamily, and fun in all relations.