Altcoin

Close-up. The term "altcoin" began simply: Bitcoin came first, and every cryptocurrency that followed was, by definition, an alternative to it. In practice the label covers an enormous range of assets. Some are early forks or copies of Bitcoin's code with minor tweaks. Others run on entirely separate blockchains with their own consensus rules, supply schedules, and design goals. Categories often grouped under the altcoin umbrella include smart-contract platform tokens, stablecoins pegged to outside assets, governance tokens, and utility tokens tied to a specific application. Because the group is so broad, "altcoin" describes what a coin is not (it is not Bitcoin) more than what it is.

Wide shot. The altcoin idea reflects a core feature of open, permissionless software: anyone can propose a different set of trade-offs. A project might prioritize faster settlement, lower fees, programmable contracts, privacy, or a novel governance model, and issue a token to coordinate that network. This diversity is the sector's engine of experimentation and also its main source of risk. Altcoins vary widely in maturity, security, decentralization, and the strength of the teams and communities behind them.

Understanding an altcoin means looking past the label to the specifics: what problem it claims to solve, how its tokenomics work, and who maintains the network. You can compare individual assets on the coins pages. This entry is educational and not financial advice — always do your own research.