Due to the fact that the first and main cryptocurrency even today is Bitcoin all other cryptocurrencies are called Altcoins.

An address in cryptocurrencies means a character set that consists of numbers and letters and most often its length is 34 characters (for example, Bitcoin addresses) and 42 characters (for example, Ethereum addresses).

Bitcoin Cash is a new cryptocurrency created as a branch of Bitcoin. Cryptocurrency separation occurred due to the necessity of changing old Bitcoin protocol with a new one in order to increase the transaction processing speed. Opinions of market participants have split into two camps and two branches were formed: one branch uses the new SegWit2x protocol and the another uses Bitcoin cash.

Bitcoin cryptocurrency was created by anonymous Satoshi Nakamoto in 2009. The main idea was to create a decentralized database copies of which will be stored by all participants in the system in an encrypted form. Units of payment are bitcoins. Bitcoins are stored on special wallets. All information about the transactions is available in the open mode while the wallets are completely anonymous.