I say it depends. On one side, I know it's vital to buy things you need and other things vital for your survival. Money is what makes you have a home, some food, some clothes, some activities... Money can help acheive a certin happiness and I can't deny that. Money is essential for everyone's survival and without it, we're kind of doomed as we can't afford nothing.
But on the other hand, personnally, I see cash as a NEED... For me, money will only bring me material needs and I need materials to make my life better. It will never bring me the equal happiness of immaterial needs like friendship, love, family and all those little things we have to cherish in life...
So on the end, I know money is NECESSARY, but it soes not mean that it can bring true happiness... And I kind of agree with Gelidus too...