# 51% attack A Address Altcoin B Bitcoin - BTC Block Blockchain / Distributed ledger C Cold Wallet / Hardware Wallet Cryptocurrency Cryptocurrency exchange D Decentralization Double-spending Decentralized applications (dApps) Digital asset E Ethereum F Fork H Hot Wallet I Initial Coin Offering (ICO) M Miner Mining Mining Pools N Node Non-Fungible Tokens (NFTs) P Proof of Stake Public Key Proof of Work Private Key S Sharding Stablecoin Smart Contract Staking T Token