$ETH Cryptocurrency** is a digital or virtual form of money secured by cryptography, making it highly resistant to fraud and counterfeiting. Unlike traditional fiat currencies, cryptocurrencies operate on decentralized blockchain networks, ensuring transparency and eliminating the need for intermediaries like banks. Bitcoin (BTC), launched in 2009, remains the dominant cryptocurrency, but newer alternatives like Ethereum (ETH), Solana (SOL), and Layer-2 solutions (e.g., Arbitrum, Optimism) have gained traction due to their smart contract capabilities and scalability. The rise of **DeFi (Decentralized Finance)** and **NFTs (Non-Fungible Tokens)** has expanded crypto’s use cases beyond investment to include lending, staking, and digital ownership. Meanwhile, regulatory scrutiny has intensified, with governments worldwide debating frameworks for stablecoins (e.g., USDT, USDC) and CBDCs (Central Bank Digital Currencies). Despite volatility and risks like exchange collapses (e.g., FTX), institutional adoption continues growing, with Bitcoin ETFs and corporate treasury investments signaling mainstream acceptance.