Fungibility of Crypto Coin
In economics, fungibility is the unit of a good and/or a commodity whose single units are essentially identical.
For example, gold is fungible. One kilogram of pure gold is equal to any other kilogram of pure gold, regardless of its form or shape. Other fungible commodities include sweet crude oil, company shares, bonds, other precious metals, and fiat currencies. Unlike the barter system, fungibility refers only to the equivalence of each unit of a commodity with other units of the same commodity excluding the exchange of one commodity for another.
With crypto coins, you can buy tokens and/or coins from a crypto coin exchange (ex. CoinBase) or another person. Please note that not all crypto coins are listed on the same exchanges because of high listing fees, different codes and/or blockchains, and other administrative reasons.