Money can buy most things but it is not everything. Money cannot buy friendships and relationships (the genuine ones); money cannot buy peace of mind, money cannot buy real happiness and money cannot buy principles.
There are very rich people who are often miserable, and there are many poor people who are happy and contented.
When used for material satisfaction and selfish purposes, the 'joy' money brings is superficial and temporary but if used for the good of all, money can bring real joy to both giver and receipient.
So, money is good and money is useful but money is not everything.
We need money to guarantee our life, but money is not everything. If you are not happy because of somebody and can't feel the value of yourself, money will become meaningless for you.