What is blockchain technology, and how does it work? 

Cryptocurrency is currently the most popular use for blockchain.

The Blockchain is an innovative database technology that is at the heart of almost all cryptocurrencies.

Blockchain is a distributed digital ledger that stores any type of data. A blockchain can record information about cryptocurrency transactions.

Many copies of a blockchain database are stored on multiple computers, rather than being maintained in one place by a centralized administrator.

There are both public and private blockchains. In a public blockchain, anyone can participate which means they can read, write or audit blockchain data.

What is private blockchain, meanwhile, is controlled by an organization or group. Only it can decide who will be invited to the system. 

The advantage of blockchain: 1.The higher the accuracy of the transaction 2. There is no need for intermediaries 3.Extra security 4.More efficient transfer

Disadvantages of blockchain :  1.Transaction limit per second 2.High energy consumption 3.Risk of asset loss  4.Potential for illegal activity

How to invest in blockchain: "The easiest way is to buy cryptocurrencies, such as Bitcoin, Etherium and other tokens that run on the blockchain," says Gray.