Cryptocurrency is a kind of digital money, which is based on the technology of cryptography, that is, data encryption. It has no physical appearance, but exists only in electronic form. Its main features are anonymity, decentralization and security.
Bitcoin is a digital and global money system currency. It allows people to send or receive money across the internet, even to someone they don’t know or don’t trust. Money can be exchanged without being linked to a real identity. The mathematical field of cryptography is the basis for Bitcoin’s security.
The number of cryptocurrencies available over the internet as of 19 August 2018 is over 1600 and growing. A new cryptocurrency can be created at anytime. By market capitalization, Bitcoin is currently (December 15, 2018) the largest blockchain network, followed by Ripple, Ethereum and Tether.