It should be teach.Because for economists and business school professors, Bitcoin and other digital tokens have raised questions about the nature of money. The first lecture in the Berkeley class, for example, considered the development of Bitcoin against the history of money.Several business school classes are also focusing on the decentralized methods of record keeping and decision making introduced by Bitcoin.Bitcoin is given credit for creating the first blockchain, a ledger of transactions that is updated by a network of computers without relying on any central company or government.