More than Half of the life span of the human race is centred on making of money or wealth.
Because without it, what would we eat? We need money to have the freedom to buy things that we need and almost all of the time, these things are needed. Water. Food. Clothes. All that needs money to buy and it takes time to accumulate one. However, lets not forget that money is only a medium of exchange to the things that we need. Happiness by heart can't be bought by that.
Money would not be needed in ideal World where people are honest and trust each other. When you need home in such world, people would help you build it for free knowing the kindness will be reciprocated. When you need to eat, you plunk corn from your neighbor's farm and the neighbor will be full of joy that someone has benefitted from his work. I think money/currency would be needed in society where people don't trust each other