An altcoin is any cryptocurrency other than Bitcoin. The main types, how they differ from Bitcoin, and the risks to weigh.
An altcoin is any cryptocurrency other than Bitcoin. As shorthand for “alternative coin,” the word covers everything from Ethereum, the second-largest crypto network by market value, to tokens that were created last week and may be gone next month. Some altcoins run large networks with years of history; others exist mainly to be traded, and many have already stopped trading altogether.
Because the label is so broad, it tells you almost nothing about a coin. In the sections below, this guide explains where altcoins came from, how they differ from Bitcoin, the main types (with a comparison table), and a simple way to look at any one of them.
An altcoin is a cryptocurrency other than Bitcoin, the first and largest cryptocurrency. In practice, the term covers coins that run their own blockchains, such as Ethereum and Solana, and tokens built on top of existing blockchains. Because altcoins differ widely in purpose, supply, security, and track record, the word describes what a coin is not.
Within about two years of Bitcoin's launch, the first altcoins had appeared. On April 18, 2011, Namecoin was announced on the Bitcointalk forum as a naming system built on a modified copy of Bitcoin's code, and it is widely described as the first altcoin. After Namecoin came Litecoin, launched on October 7, 2011, with faster blocks (every 2.5 minutes) and a different mining algorithm.
Technically, yes. Since Ethereum is not Bitcoin, it fits the definition, even though it is large enough that many people treat it as its own category alongside Bitcoin rather than as one altcoin among thousands. Its design goals differ from Bitcoin's; our Bitcoin vs Ethereum comparison explains how.
Altcoins differ from Bitcoin in purpose, supply rules, security, and history. From the start, Bitcoin was built as a peer-to-peer currency with a fixed supply of 21 million coins and proof-of-work mining. Altcoins may run smart contracts, use proof of stake, have uncapped or adjustable supplies, and usually have far shorter track records.
| Feature | Bitcoin | Altcoins (varies widely) |
|---|---|---|
| Launched | January 2009 | From April 2011 onward |
| Main purpose | Peer-to-peer digital money | Smart contracts, payments, stablecoins, governance, speculation, and more |
| Supply | Fixed at 21 million | Capped, uncapped, or adjustable by developers or holders |
| Security model | Proof of work | Proof of work, proof of stake, or other designs |
| Who can change the rules | Broad network agreement | Ranges from broad agreement to a small team or company |
| Track record | More than 17 years | From about 15 years to a few days |
Of those differences, security design is the least visible. Most smart contract platforms now use proof of stake instead of mining, a trade-off covered in our guide to proof of work vs proof of stake.
The main types of altcoins are smart contract platforms, payment coins, stablecoins, DeFi and governance tokens, utility tokens, privacy coins, and meme coins. In practice, the categories overlap, and a single coin can fit several. Grouping them by what they do is more useful than grouping them by price, because each type carries different risks.
| Type | What it does | Examples | Main risk |
|---|---|---|---|
| Smart contract platforms | Run applications and other tokens | Ethereum, Solana, Cardano | Competition and technical failures |
| Payment coins | Move value quickly or cheaply | Litecoin, XRP | Adoption may not match the design |
| Stablecoins | Track a currency such as the US dollar | USDT, USDC | Issuer reserves and regulation |
| DeFi and governance tokens | Give holders a vote or a role in a protocol | Varies by protocol | Smart contract bugs and concentrated voting |
| Utility tokens | Pay for a specific service or network | Varies by network | Value depends on real usage |
| Privacy coins | Hide transaction details | Monero, Zcash | Delistings and regulatory pressure |
| Meme coins | Trade on community attention | Dogecoin and many newer tokens | Extreme volatility and no utility |
Smart contract platforms are blockchains that run programs, which lets other developers build applications and issue their own tokens on them. Fees are paid in the native coin. Of these, Ethereum is the largest; Solana and Cardano use their own designs to handle more transactions or reach agreement in other ways.
Payment coins aim to move value faster or more cheaply than Bitcoin. Where Litecoin kept Bitcoin's basic design but shortened block times, XRP runs on the XRP Ledger, which confirms transactions without mining through agreement among validating servers run by independent operators around the world. See our page on how to buy XRP.
Stablecoins are tokens designed to hold a steady value, usually one US dollar, backed by reserves such as cash and government bonds. Some people exclude them from the altcoin category because they are not meant to change in price, even though they run on the same blockchains and trade on the same platforms as other altcoins. With stablecoins, the risks sit with the issuer: reserves, redemption, and the rules in each country.
Meme coins are tokens whose value rests mainly on online attention and community. Since its creation as a joke in 2013, Dogecoin has survived; most meme coins do not. Because the vast majority have no utility beyond trading, their prices can swing sharply in hours, and many lose nearly all their value. Plenty go to zero. Our guide to meme coins covers them in more depth.
Millions of altcoins have been created, but most no longer trade. Of the more than 25.2 million tokens listed on GeckoTerminal since 2021, 13.4 million had stopped trading, CoinGecko's research found. In 2025 alone, 11.6 million failed, the highest yearly count in its data.
Few were serious projects. CoinGecko links the surge to launchpads that let anyone create a token in minutes, and it notes that the ease of launching tokens on those platforms flooded the market with low-effort meme coins and projects. Among all altcoins, the number with years of history, active development, and steady trading is a small fraction of the total, which is why a coin's age and trading record say more about it than the size of the category does.
Altcoin season is an informal term for a period when many altcoins rise faster than Bitcoin. Some trackers define it using a threshold, such as how many large altcoins outperformed Bitcoin over a recent window.
Because rallies of this kind can reverse quickly, treating one as a reason to act carries obvious risk. For how price cycles tend to develop, see our explainer on the Bitcoin market cycle and halving.
The main risks of altcoins are high volatility, thin liquidity, concentrated ownership, project failure, regulatory action, and outright scams. Smaller ones carry more. For many altcoins, price moves that would be extreme for Bitcoin are common, and losses can be total when a project is abandoned by its developers and its community moves on.
With fewer buyers and sellers, a single large order can move an altcoin's price a long way. Selling at the price you see is not guaranteed, especially in a falling market. Our guide to crypto liquidity explains why thin markets exaggerate price moves.
At launch, many altcoins set aside large shares for founders and early investors, released on a schedule. When those tokens are released, new supply can reach the market quickly. Reading a coin's tokenomics (its supply, distribution, and release schedule) shows who holds what, and when they can sell.
Some teams stop building. Others never meant to; in a rug pull, the creators drain a token's trading pool or sell their holdings and disappear. Before buying, check whether the project has a working product, public developers, and a history longer than a few months, since a token with no product and anonymous founders leaves you with very little to rely on if things go wrong.
In some countries, regulators treat certain tokens as securities and restrict others, such as privacy coins, which several exchanges have delisted under regulatory pressure. Reclassification can limit where a token trades.
You can evaluate an altcoin by asking three questions: what does it do, and does anyone use it; who controls its supply; and how has it held up over time, including through market downturns. None of this predicts price. The answers show what you would be relying on.
Whether any altcoin belongs in a portfolio is a personal decision. Our guide to building a diversified crypto portfolio covers the principles of diversification, including why concentration in small, volatile assets raises risk.
Yes. By definition, any cryptocurrency other than Bitcoin is an altcoin, and that includes Ethereum. Because of its size and its role as the main smart contract platform, many people discuss it separately, but it still fits the definition. The label says nothing about size.
It depends on who is counting. Stablecoins such as USDT and USDC are cryptocurrencies other than Bitcoin, so they fit the broad definition. Many data providers and investors track them separately, though, because they are designed to hold a steady value instead of rising or falling in price like most other crypto assets do.
A coin runs on its own blockchain, as Bitcoin, Ether, and Litecoin do. By contrast, a token is built on top of another blockchain, often using smart contracts on Ethereum or Solana. Both are called altcoins in everyday use, but a token also depends on the security of the network that hosts it.
Most meme coins have no utility beyond being bought, sold, and discussed online. Their prices depend on attention, which can disappear quickly, and CoinGecko data shows that millions of low-effort tokens stopped trading in 2025 alone. Meme coins carry extreme volatility and a high risk of total loss.
Generally, yes. Most altcoins have shorter histories, less liquidity, and more concentrated ownership than Bitcoin, which tends to make their prices more volatile. Risk still varies widely between individual altcoins, so a large, established network and a newly launched token should never be treated the same way.
There is no general answer, and this guide does not give investment advice. Altcoins range from established networks to tokens that stopped trading within weeks. Whether any altcoin suits you depends on your goals, time frame, and tolerance for loss, which is worth discussing with an independent financial adviser.
Choosing among thousands of altcoins is easier with someone who can explain how each one works. UpTrade is a dedicated crypto brokerage built around real relationships, not a self-serve app.
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This article is for general informational purposes only and does not constitute financial, investment, or tax advice. It does not recommend any asset, allocation, or strategy. Cryptocurrency investments carry significant risk, including the possible loss of principal. Past performance is not indicative of future results. UpTrade does not make investment recommendations based on your personal financial circumstances. You should conduct your own research and seek independent financial advice before making any investment decisions.
General information only. This article is for educational purposes and does not constitute financial, investment, legal or tax advice, nor a recommendation to buy, sell or hold any asset. Cryptocurrency is a high-risk asset and you should consider your own circumstances and seek independent advice before making any decision. UpTrade does not make price predictions.
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