What are Altcoins

What is an Altcoin?

The word altcoin comes from alternative coin — any cryptocurrency that is not Bitcoin.

When Bitcoin was created in 2009 — it was the only cryptocurrency. But developers around the world saw the technology and thought — “we can build on this and improve it.”

Today there are over 20,000 altcoins in existence.

Why Do Altcoins Exist?

Each altcoin was created to solve a specific problem or improve on Bitcoin in some way.

Bitcoin’s limitations:

• Slow — only 7 transactions per second
• Expensive — high transaction fees during busy periods
• Limited — only stores and transfers value, not much else

Altcoins try to solve these problems.

The Most Important Altcoins

Ethereum (ETH)
The second largest cryptocurrency. Ethereum introduced smart contracts — self executing agreements written in code. This made it possible to build apps, games and financial systems on top of blockchain.

Solana (SOL)
Extremely fast — 65,000 transactions per second. Much cheaper fees than Ethereum. Popular for gaming and NFTs.

XRP
Created by Ripple for fast international bank transfers. Can settle transactions in 3-5 seconds with near zero fees.

Cardano (ADA)
Built with a research first approach. Every feature is peer reviewed by academics before being added.

BNB
The native coin of Binance — the world’s largest crypto exchange. Used to pay trading fees at a discount.

Categories of Altcoins

Layer 1 — Base blockchains
These are complete blockchain networks like Ethereum, Solana, Cardano. They are the foundation everything else is built on.

Layer 2 — Speed solutions
Built on top of Layer 1 to make transactions faster and cheaper. Examples: Polygon, Arbitrum, Optimism.

DeFi tokens
Used in decentralized finance applications — lending, borrowing, trading without banks. Examples: Uniswap, Aave, Chainlink.

Stablecoins
Designed to maintain a fixed value — usually $1. Examples: USDT, USDC. Used to avoid volatility.

Memecoins
Started as jokes but became serious investments. Examples: Dogecoin, Shiba Inu. Extremely high risk.

How to Tell Good Projects From Bad

With 20,000+ altcoins — most will fail. Here is how to evaluate:

Good signs:

• Real problem being solved
• Experienced development team
• Active community
• Working product — not just promises
• Clear tokenomics — limited supply

Red flags:

• Anonymous team with no history
• Promises of guaranteed returns
• No clear use case
• Copied code from other projects
• Heavy celebrity promotion

The 80/20 Rule of Crypto

In crypto — approximately:

• 80% of trading volume happens in the top 20 coins
• 80% of altcoins will eventually go to zero
• Top 10 coins capture most of the market value

For beginners — stick to the top 10 coins by market cap. The further down the list you go — the higher the risk.

In the next topic we will learn how crypto exchanges work and how to buy your first cryptocurrency.