Question

How many types of blockchains have emerged after bitcoin introduced blockchain to the world?

Answer 1

Bitcoin popularized the concept of the blockchain at a global level. While Bitcoin targeted an improvement in the existing financial system, the underlying technology has been used to record varying events- the blockchain is now used for keeping medical records, management records, transaction processing, beauty & wellness, food industry, supply chain management, identity management, aviation industry, Internet of Things, to name just a few. 

The blockchain can itself be permissioned or permissionless. It can also be public or private as far as its types go.    

Answer 2

The answer is three.

Three types of blockchains have emerged after Bitcon introduced blockchain to the world.

*Public – The blockchain is open to all and anyone can read, write or audit it.

*Private – The blockchain belongs to a specific person who decides what access is to be given to whom regarding the blockchain.

*Federated or Consortium – The blockchain is owned by more than one person who collectively make decisions on the operations of the blockchain.