Cryptocurrency transactions are recorded on a decentralized ledger. This ledger is called a blockchain. Every time crypto is bought or sold, the transaction is added to the blockchain — a public database of the transactions, which is available to other crypto holders. Anyone can join and participate in the blockchain, but data on individual transactions — and the people involved with them — are secured using cryptography (the basis for the term cryptocurrency). For each transaction added to the blockchain, there’s a digital validation process to verify it and prevent fraud.
The launch of NYCCoin follows MiamiCoin, which to date has earned more than $21.3 million since its August 2020 launch, the nonprofit said.

Safemoon crypto is not a coin, but a token. It has seen major price rises movements over just a few months in 2021. The price surged by tens of thousands of percent in April and May, then lost most of those gains by August. Such volatility is far from unusual in the crypto space.
— “Those are among the more visible recent fruits of a well-funded campaign by Mr. Orban in the United States that stretches back a decade and now stands as a case study in how governments around the world seek to shape policies and debates in Washington, sometimes raising concerns about improper foreign influence in U.S. politics.”