For me, I support this idea that financial education for teenagers is necessary.
It would be better if you could provide us with the full prompt of the essay. Does the prompt mention the particular level of education?
If they are trained about finance, they will consider to spent money reasonably. Which demand is really necessary and which isn't.
Deep understanding of finance will help them manage their money wisely and give priority to demands of real importance.
who are without
who lack
finance should be subject
finance should be included in
after graduate
after graduation
many young people begin trading in something
This is not clear. What are they trading and why?
However, most of them are lacking capability of financial analysis. Commonly, the reason can be the lack of good foundations or not take in mean of financial terms.
I feel that these two sentences depict the same meaning. This won't add more value to your paragraph.
should equip
should be equipped
However, preparing knowledge about finance should include awareness of real value of services and merchandise, otherwise it will make them so considerate and gradually become miserly.
It is more like another idea that you haven't stated in your essay.
I hope this helps!