LSK Coin, also known as Lisk, is a cryptocurrency that was launched in 2016 by Max Kordek and Oliver Beddows. It is a decentralized blockchain platform that allows developers to create and deploy their own decentralized applications (dApps) using JavaScript.

Lisk operates on a delegated proof-of-stake (DPoS) consensus algorithm, which means that token holders can vote for delegates who validate transactions and secure the network. This system is designed to be more energy-efficient and scalable than traditional proof-of-work algorithms used by cryptocurrencies like Bitcoin.

Some people may refer to Lisk as "air money" because it exists solely in digital form and does not have a physical counterpart like traditional fiat currencies. However, Lisk can be used to make payments, store value, and participate in the Lisk ecosystem by voting for delegates and interacting with dApps.

Like other cryptocurrencies, the value of Lisk can fluctuate significantly based on market demand and other factors. This means that investing in Lisk can be risky, but it also offers the potential for high returns.

Overall, Lisk is a legitimate cryptocurrency with a dedicated development team and a growing community of users and developers. While it may not have the same widespread acceptance as more established cryptocurrencies like Bitcoin or Ethereum, Lisk offers unique features and opportunities for those interested in blockchain technology and decentralized applications.