The Incan Empire had no form of money. In other words, salt or beads or gold were not used as worth more than anything else. Technically, gold and silver were worth more — as religious objects worthy of worship. Other than that, the weight of gold was worth what you were willing to trade for it. It was a basic barter economy.
Not necessarily true. More likely, we don’t yet understand the pre-colonial economies of the New World. There is research going on in the role of textiles in Incan culture as a form of writing. There may be an economic function as well: we use paper checks but don’t think of them as “writing” or barter. Barter works at the local level, but trade over long distances has almost always used some form of “money”