What is "chrematistics"

Chrematistics \Chre`ma*tis"tics\, n. [Gr. ? 9sc. ?) the art of traffic, fr. ? goods, money, fr. ? to use.] The science of wealth; the science, or a branch of the science, of political economy.

n. Study of wealth

Chrematistics (from Greek: χρηματιστική) according to Thales of Miletus is the art of getting rich.