$ETH is a decentralized digital currency, created in 2009 by an unknown person or group using the name Satoshi Nakamoto. It operates on blockchain technology, which ensures transparency, security, and immutability of transactions. Bitcoin allows peer-to-peer transfers without the need for any central authority or intermediary. Due to its limited supply of 21 million coins, many see it as "digital gold." However, its price is highly volatile, and it is subject to regulatory scrutiny in many countries.