We will always need money. For the same reason we will always need language. the problem with money is merely in it's manipulation and the power for a small group to defraud it. But otherwise, society literally is not possible without money.

In fact, the very reason society is in decline, and rots before our eyes, is because we are watching the fallout of the rotting of our money. They are one in the same.

The ability to securely communicate and trade value is the foundation of civilization itself. When the money rots, society rots.