NFTs, or non-fungible tokens, are a type of cryptocurrency created on a smart contract platform such as Ethereum, Avalanche or Solana. They are unique digital objects that can be cool to own or even profitable to trade. Think of them as digital collectible cards. They typically start out as something only enthusiasts care about, but if you get a rare one, it could be worth a lot one day.
Cryptocurrencies can be fungible, meaning all the currency’s units (i.e., tokens) are the same and equal, like (for example) dollars or common shares of a company. You give me a dollar, I give you a different dollar back, and we’re both back to exactly where we started.