Soon after the launch of Bitcoin, other crypto-coins began to emerge.
By this time, there are hundreds of new coins released on the market, which differ from Bitcoin in some or many features. For example, they can be mined with less work than Bitcoin, and the number of coins that can be mined also varies for each coin. The most important difference between altcoins and bitcoin is the job proof algorithm. In the case of altcoins, the algorithm does not contain the protocol of increasing difficulty, which means that it is easier and more profitable for people to mine them than to mine bitcoin.
The success of a given currency depends to a large extent on the strength of the community it creates. Altcoin that has the largest market share after Bitcoin is Litecoin.