For the reason that they can provide exceptional properties which make them unique and digitally scarce.
Quite a few tokens – and in fact cryptocurrencies – are fungible. If you deliver an individual a Bitcoin, and get just one back, you wouldn’t discover any variation.
A large amount of the time, fungible tokens are built applying a conventional known as ERC-20. For the sake of simplicity, let’s imagine just about every of these tokens is a $10 bill. If you sent a token to an individual, and acquired a different just one back a 7 days later on, they would be similar. (That said, there may be some fluctuation in price tag.)
This all improvements with non-fungible tokens, many of which are ERC-721 compliant. These can be in contrast to baseball cards, as just about every has exceptional details and different ranges of rarity. If you were being to unintentionally deliver just one of these tokens to an individual, and get a unique ERC-721 token back, you may be extremely upset.
There’s just one additional important variation you want to bear in brain. Fungible tokens are divisible – that means you can deliver a fraction of just one ERC-20 token. (Like money, the place you can pay out with a $10 bill and get improve.) On the other hand, non-fungible ERC-721 tokens are not able to be divided and will have to be acquired or sold total. (Like baseball cards, the place no just one in their proper brain would want to purchase 50 %.)