Last Updated: March 2026
If you’ve ventured beyond Bitcoin, you’ve entered the world of altcoins—the thousands of alternative cryptocurrencies that make up the broader crypto ecosystem. From Ethereum to memecoins, this guide explains what altcoins are, the major categories, and how to evaluate them.
What Is an Altcoin?
An altcoin (alternative coin) is any cryptocurrency other than Bitcoin. The term covers everything from Ethereum (the second-largest crypto) to brand-new memecoins launched minutes ago. While Bitcoin was created primarily as digital money, altcoins serve a wide variety of purposes.
Major Altcoin Categories
Smart Contract Platforms
Blockchains that support programmable applications (dApps, DeFi, NFTs). These are the “operating systems” of crypto.
- Ethereum (ETH): The largest smart contract platform. See ETH analysis
- Solana (SOL): High-speed, low-cost alternative. See SOL analysis
- Cardano (ADA): Research-driven, peer-reviewed. See ADA analysis
DeFi Tokens
Governance and utility tokens for decentralized finance protocols.
- Uniswap (UNI), Aave (AAVE), Maker (MKR)
See our DeFi projects guide and What is DeFi?
Memecoins
Community-driven tokens with value based on culture and momentum rather than technology.
- Dogecoin (DOGE), Shiba Inu (SHIB), Pepe (PEPE)
See our memecoin guide, best memecoins, DOGE prediction
Infrastructure
Tokens powering essential blockchain services (oracles, indexing, storage).
- Chainlink (LINK), The Graph (GRT), Filecoin (FIL)
Layer 2 Tokens
Scaling solutions built on top of existing blockchains.
- Arbitrum (ARB), Optimism (OP)
See our Layer 2 guide
AI and DePIN
Tokens at the intersection of AI, physical infrastructure, and blockchain.
See our AI crypto guide
How to Evaluate Altcoins
- Use case: What problem does it solve? Is there real demand?
- Team: Who’s building it? What’s their track record?
- Tokenomics: Supply, inflation, distribution, and unlock schedules
- Adoption: Active users, TVL, transaction volume, developer activity
- Competition: What alternatives exist? Why would this project win?
For detailed evaluation: Best altcoins guide | Research tools
Altcoin Risks
- Higher volatility: Altcoins are far more volatile than Bitcoin—50-90%+ drops are common
- Most go to zero: The vast majority of altcoins eventually lose all value
- Scams: New altcoins are a primary vehicle for rug pulls and fraud. See scam guide
- Liquidity risk: Smaller altcoins can be difficult to sell without large price impact
Frequently Asked Questions
Should I invest in altcoins or just Bitcoin?
Bitcoin is the safest crypto investment and should form your core holding. Altcoins offer higher potential returns with significantly more risk. Most advisors suggest 50-70% BTC, 20-30% ETH, and 10-20% selected altcoins. See our portfolio strategy and BTC vs ETH comparison.
What’s the best altcoin to buy?
Ethereum is the safest altcoin. Beyond ETH, it depends on your research and conviction. Focus on tokens with real usage, strong teams, and clear competitive advantages. See our altcoin guide.
When is the best time to buy altcoins?
Historically, accumulating altcoins during bear markets and early Bitcoin recovery phases produces the best returns. See our bear market guide and market cycles guide.
