Wanting more led to the creation of "wealth" which led to the passing of small green pieces of paper. The small green pieces of paper eventually reminded those who didn't have it that they didn't have enough of it. And so some of them invested in watches. Which was a silly concept because it was time that was their most valuable asset, and no amount of metallic coins or small green pieces of paper, or even digital versions of small green pieces of paper could purchase more of. Even for fans of Douglas Adams using their time to vaguely quote a satirical concept regarding these small green pieces of paper.