I've noticed that many newcomers to crypto still get confused about the terminology. They ask: what is an altcoin? In reality, it's simple — any cryptocurrency other than Bitcoin. When BTC first appeared, all other projects were mainly created to solve its problems: slow transactions, high energy consumption. But over time, altcoins have developed into a separate ecosystem with their own features and use cases.

Yes, what an altcoin is in the modern sense is no longer just a copy of Bitcoin. Now, it's a whole class of assets with different functions. There are platform tokens like Ethereum and Solana, which are used to build decentralized applications. There are DeFi tokens for financial protocols like Uniswap and Aave. There are stablecoins like USDT to reduce volatility. And yes, there are meme coins that sometimes skyrocket thanks to community support.

Regarding promising projects, Ethereum remains the king of platforms. After switching to PoS, the network became more energy-efficient and faster. The DeFi and NFT ecosystem there is simply huge, plus Layer 2 solutions make scaling feasible. Solana is also interesting — high speed, low fees, perfect for mass applications. If they solve their technical issues, they will become even stronger.

Cardano attracts developers who value security and a scientific approach. Proof-of-Stake ecology, support for smart contracts via Alonzo — all of this is built for the long term. Polkadot addresses a different task: it’s about interoperability between different blockchains, about a multi-chain future. This is relevant when everyone wants compatibility.

There’s also another major token used on one of the largest exchanges, but I won’t focus on it. Instead, I’ll mention Chainlink — a decentralized oracle without which smart contracts cannot access real-world data. As DeFi grows, demand for LINK only increases.

When choosing an altcoin for investment, look at several factors. First — does the project have real use, does it solve specific problems? Second — the team and partners. Well-known people and serious companies backing it are a good sign. Third — technological development. What updates are planned? How does the project scale? Fourth — remember that the crypto market is volatile; prices depend on emotions and news.

In general, what is an altcoin today — it’s not just an alternative to Bitcoin, but an entire industry with different development directions. Ethereum, Solana, Cardano, Polkadot, Chainlink — these are projects that are really building something, not just existing. If you analyze each project carefully, you can find assets aligned with your goals and risk tolerance. On Gate, you can track all these assets and see how they develop.