One way to use blockchain is to transform Bitcoin. These variations are advertised as better or more advanced versions than the original Bitcoin, and are also called Altcoin. Here are some of the main altcoins:
LITECOIN: Launched in 2011, LITECOIN is a very slightly modified cryptocurrency in Bitcoin. The only difference is that block creation takes less time than Bitcoin. In Bitcoin, it takes about 10 minutes, while Litecoin generate blocks every 2.5 minutes. In other words, it means that the transaction is confirmed faster. Another difference is the hashing algorithm used. Bitcoin uses SHA256 as a proof of work algorithm, while Litecoin uses crypt. One feature of Crypt is that it is a little harder to create an optimized CPU or GPU that can solve puzzles quickly. For this reason, the attractiveness of light coins to miners is similar to that of bitcoin. Nevertheless, there is ASICS today that can be used to mine light coins.
Zcash: Zcash was released in 2016. It provides safe transactions with books distributed like Bitcoin. The difference from Bitcoin is that it uses a different proof of work algorithm (zk-SNARK) and chooses a different privacy strategy. In the Bitcoin system, the remitter, recipient, and remitted amount are all disclosed, while Zcash is kept confidential and protected. At the end of 2017, Zcash exceeded a billion dollars in market capitalization.
Dogecoins: Dogecoins actually started as a joke about being perceived as cryptocurrency enthusiasts. The logo inside the coin contains the face of a dog called Doge, which is popular on the Internet. There is no difference or improvement in the perfect replica of Bitcoin. The reason is that DogeCoin itself did not seriously start the service. In the early days, the value of coins was very low. However, since then, its value has risen considerably, attracting the attention of several investors. It has recently exceeded a market capitalization of $2 billion. As Dogecoins, which creators first started as a joke, became of tremendous value, they eventually excluded creators from the project