Bitcoin is a form of digital currency which is based on an
open source code that was created and is held
electronically. Bitcoin is a decentralized form of
currency, meaning that it does not belong to any form of
government and is not controlled by anyone.
Tether (USDT) is the largest stablecoin by market capitalization. Crypto traders use stablecoins like Tether to make transfers between different cryptocurrencies or to move their investments into or out of fiat currencies. The value of USDT is pegged to the U.S. dollar.
Ethereum is a decentralized blockchain with smart contract functionality. Ether is the native cryptocurrency of the platform. Among cryptocurrencies, ether is second only to bitcoin in market capitalization. It is open-source software. Ethereum was conceived in 2013 by programmer Vitalik Buterin
Litecoin is a decentralized peer-to-peer cryptocurrency and open-source software project released under the MIT/X11 license. Inspired by Bitcoin, Litecoin was among the earliest altcoins, starting in October 2011. In technical details, the Litecoin main chain shares a slightly modified Bitcoin codebase.