As far as I know, money cannot buy happiness, but yes, people cannot be happy without money. They are directly and indirectly related to each other, those who have more money have more problems, especially symptoms of illness and mental stress. Such problems can always be reflected in the rich and wealthy people.
In this world, every person runs after money to earn income, so in everyone's life, earning money is the biggest sign of survival and money has to be fought for every moment.