What is Cryptocurrency and Bitcoins?

What is Cryptocurrency and Bitcoins?
Crypto currency is a type of digital currency which uses cryptography to secure its transactions.
Crypto currencies are used as an alternative currency.

As against centralized electronic currency and banking systems cryptocurrencies operate in a decentralized way.

Each cryptocurrency works through a blockchain. It is a public transaction database and functions as a distributed ledger.

Bitcoin was created in 2009 and has functioned as an alternative form of currency since then.
Bitcoin transactions are infamous for facilitating black market transactions.
The legal status of cryptocurrencies still have no permanent legal status and it varies from one country to another.