Wow, the uses of money are ASTRONOMICAL but for the sake of the argument, money is the tool to live in the 21st century (unless you prefer becoming a hobo well that's fine). There's no guarantee that you'll live a 'happy' life with money, but it'll definitely bring some food on the table. No money =no food
no food= no mood
no mood= no study
no study= no smart
no smart=no job
no job= no money
no money= hobo