Why is everything is so expencive?

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All the time i dream about the feuture in few years i finish school and i want to go to a trip all over the world in the last two years i am looking for ways to earn money so when i am be older i can make my dreams came true i know i probably not going to seccide i just dream but the thing that makes me crazy is the prices of things in my contrey a cup of coffe can cost 10 dollars why does the prices so big to buy a car i need to save a lot of money.. why does the sorld crazy?