Depends what you mean by happyness. Some people see it as having a nice life without getting serious illness, not having kids, not having with whom to stay and so on. Money, money is not everything we need in the life because sometimes they can not be useful for certain things that we can face during our life but I would say if you have money, more than half of the problems that you have in real life will be solved and that is a fact but at the same time it can be dangerous having a lot of money because some people can not control their emotions and do silly mistakes that can end up their life so it all honestly depends on a person on how he is used to manage everything