Intro to Psychology: https://www.coursera.org/learn/introduction-psychology

The Modern World, Part One: Global History from 1760 to 1910: https://www.coursera.org/learn/modern-world (2nd part is as great as the first one)

People are spending it. And a lot of it. You need to spend ether to put smart contracts into the Ethereum blockchain and you also pay for transaction fees with it.