An altcoin is any cryptocurrency other than bitcoin. The word is short for "alternative coin", and it covers thousands of projects, from established networks with large developer communities to small tokens with little more than a website and a price. Price sites list many of them next to bitcoin, so they look similar on a screen, but they differ enormously in purpose, quality and survival.
This guide explains what altcoins are, why they exist, how they are usually grouped, and why most of them struggle over time. It is a description of the category, not a recommendation for any coin in it.
What counts as an altcoin
Strictly, any coin other than bitcoin is an altcoin. Ether, the native coin of the Ethereum network, is the most common example, and it is usually grouped with bitcoin as one of the two large assets in the market. Stablecoins, which hold a steady value, are sometimes grouped separately, and so are tokens built on other networks.
The term tells you almost nothing about quality. It is a label for everything that is not bitcoin, and the range within it is wider than in almost any other market.
Why altcoins exist
Altcoins were created for several reasons. Some were designed to fix limits in bitcoin, such as its speed, its fee levels or the way it handles software changes. Some introduced new features, such as programmable contracts that run automatically on a network. Some were built for specific uses, such as privacy, payments or data storage. Others were copies of existing designs, launched with little change to the code, often to gain attention or to test a quick profit.
The original purpose of a coin matters for the question of whether it will last. A coin that solves a real problem for a real group of users has a reason to exist. A coin with no use beyond trading has only the attention of traders, and attention moves on.
How altcoins are usually grouped
Market observers often sort altcoins into groups. Layer-1 networks have their own blockchain and security, and they are the foundation for other projects. Layer-2 networks are built on top of a layer-1 network, to make it faster or cheaper. Application tokens give access to a product or a service. Governance tokens give holders a vote on a protocol. Meme tokens have little purpose beyond attention. The groups overlap, and a single project can fit more than one.
Grouping helps you ask the right question. A layer-1 network needs developers, security and users. An application token needs the application to be used. A meme token needs continued attention, which is a fragile basis for value.
Why most altcoins struggle
Several forces work against most altcoins over time.
Competition. A new network must attract developers, users and liquidity from established rivals. Only a few manage it, and many of the largest networks in any cycle are not the largest ones in the next.
Liquidity. Many altcoins trade on few exchanges with thin volume. A downturn often drains that liquidity quickly, leaving holders unable to sell at a fair price.
Dilution. Many projects release large amounts of new tokens to insiders, investors and reserves. As the supply grows, the price has to rise just to stand still. The guide on circulating and total supply shows how to check this.
Attention. Altcoins often rise on hype and fall when the hype fades. A project that loses developers or community interest can lose its value even if its code still works.
Failure. Some projects are abandoned, hacked or revealed as frauds. A coin can drop to nearly nothing and stay there. Many altcoins that were large in one cycle no longer trade in any meaningful size.
What altcoins do in a downturn
In most crypto downturns, altcoins fall further than bitcoin. The reasons are the thinner liquidity, the weaker holder base and the greater dependence on sentiment. A coin that fell 30 percent while bitcoin fell 20 percent is a typical pattern, and the gap widens in the worst phases.
In an upturn, altcoins can rise more than bitcoin. That is what makes them attractive, and it is also what makes them dangerous. The same leverage works in both directions, and the recovery from a large fall is much harder than the fall itself.
A worked example: the gap in a fall
Suppose you hold two positions of 1,000 each at the top of a cycle. One is bitcoin, the other an altcoin. In the downturn, bitcoin falls 50 percent and the altcoin falls 85 percent.
| Position | Start | After a 50% fall (bitcoin) or 85% fall (altcoin) | Rise needed to recover |
|---|---|---|---|
| Bitcoin | 1,000 | 500 | 100% |
| Altcoin | 1,000 | 150 | about 567% |
The altcoin needs a rise of more than five and a half times just to get back to where it started. Few altcoins manage that, and many never do. Diversifying into altcoins adds exposure to a group where most individual members lose heavily in a downturn.
What to check before you look at any altcoin
- What problem the coin solves, and whether that problem is real and current.
- The team, their track record and whether they are identifiable.
- The development activity, shown on public code repositories, and whether it is growing or fading.
- The supply schedule, the insider holdings and any planned unlocks.
- The liquidity: volume, the number of exchanges and the spread.
- Whether the coin is subject to any regulatory action in your country.
Each question has an honest answer that can be checked, and the answers often show that a coin is weaker than its marketing suggests.
The role of the developers
For many altcoins, the development team is the main reason the coin still works. Code has to be maintained, bugs fixed, security audited and upgrades delivered. When a team shrinks or stops, a network can stall even though its tokens still trade. Public code repositories show how much activity a project has, how many contributors work on it and how often changes are made. A quiet repository is not proof of failure, but a project whose activity has faded to nothing deserves a hard look before any purchase.
Common mistakes
Assuming a low price means cheap. A coin priced at a fraction of a cent can have a large supply and a small value per coin.
Chasing the largest gains. A coin that rose 500 percent in a week has often been priced for a success that may not come.
Ignoring the exit. A thin market can make selling hard, and a plan should include how you would leave.
Holding for a rebound that never comes. A coin that has lost its users rarely recovers all its value.
Key takeaways
An altcoin is any cryptocurrency other than bitcoin, and the category covers an enormous range of projects. Altcoins exist to solve problems, add features or test ideas, and their purpose decides whether they last. Most struggle because of competition, thin liquidity, dilution, fading attention and outright failure, and in a downturn they usually fall further than bitcoin. Check the problem a coin solves, its team, its development activity, its supply and its liquidity before you consider any position, and size any altcoin holding so that a total loss would not break your plan.
This guide is for general information, not financial advice. See the disclaimer.