$BNB Shiny gold coins fell on the little cat's head, and the little cat was puzzled: the shiny gold coins are not real currency (the government does not recognize them), this type of currency is called cryptocurrency (such as Bitcoin, Ethereum, etc.). The little cat tried to buy fish with cryptocurrency, but the fishmonger only accepted (legally recognized) cash. So the little cat told his friends about cryptocurrency. The little cat's friends explained to him: this is a form of de-banking, existing only on the internet (you could say it's a kind of 'retail currency' independent of the system), with no paper notes, just a string of numbers on a computer (but due to acceptance by people all over the world), it can be easily sent through blockchain. The little cat went to a store that accepted cryptocurrency and transferred it to the other party's address through the blockchain. The little cat finally bought delicious fish jerky. The little cat was very happy.