WHAT IS CRYPTO CURRENCY??
A cryptocurrency (or crypto currency) is a digital currency or online money designed to work as a means of exchange. It typically does not exist in physical form (like paper money) and is typically not issued by a central authority.
Bitcoin, was the first crypto currency in 2009, is the first decentralized cryptocurrency.
Since the release of bitcoin, over 6,000 altcoins.
NOW ETHERUM IS THE SECOND HIGHEST.