Tokens, coins, and NFTs (and why the distinctions matter)

Why the vocabulary matters

The vocabulary of crypto is, in popular usage, often wrong. People say "Bitcoin token" when they mean "Bitcoin." They say "altcoin" when they mean any token that is not Bitcoin (which loses the distinction between an actual altcoin and an ERC-20 token). They say "NFT" when they mean an image they bought online, conflating the smart contract that represents ownership with the underlying media.

These are not pedantic distinctions. They describe genuinely different things with different mechanics, different security models, and different risk profiles. Getting them right is the prerequisite for evaluating any project's claims.

Coin vs token

A coin is the native cryptocurrency of its own blockchain. Bitcoin (BTC) is the native coin of the Bitcoin network. Ether (ETH) is the native coin of Ethereum. SOL is the native coin of Solana. ADA for Cardano. DOT for Polkadot.

Coins are required for transaction fees on their own networks. They are also often required for staking (in proof-of-stake systems) or paid as block rewards to miners (in proof-of-work systems). The coin and the blockchain are tightly coupled — without the coin, the network does not function.

A token is an asset issued on top of an existing blockchain by a smart contract. The token is not native to any blockchain. It runs on someone else's blockchain. The most common case is ERC-20 tokens on Ethereum — Tether (USDT), Circle's USDC, Uniswap's UNI, Aave's AAVE, and thousands of others. These are all tokens. They exist as records in smart contracts on the Ethereum blockchain.

The structural difference matters. If something happens to Ethereum, every ERC-20 token on Ethereum is affected. If something happens to Bitcoin's network, only Bitcoin is affected. Tokens inherit the security and operational properties of the chain they run on. Coins have their own.

Token standards: ERC-20, ERC-721, ERC-1155

On Ethereum, several token standards define how different categories of tokens work. Standards matter because they let wallets, exchanges, and other contracts work with any token that follows the standard — not just specific tokens with custom interfaces.

ERC-20 is the standard for fungible tokens. "Fungible" means each unit is interchangeable with another. Your 100 USDC is the same as anyone else's 100 USDC. The ERC-20 spec defines a common interface (transfer, balanceOf, approve, etc.) that any wallet or contract can call. This is why MetaMask can display any ERC-20 token balance, and why DEXs can trade any ERC-20 pair — they all conform to the same interface.

ERC-721 is the original NFT standard. NFT means non-fungible token. Each token ID under this standard represents a unique asset. Token #1 is different from token #2. The contract tracks ownership of each unique ID and the metadata associated with it. The CryptoPunks and Bored Ape Yacht Club collections are ERC-721 contracts.

ERC-1155 is a more flexible standard. It lets a single contract issue both fungible and non-fungible tokens, and bundle multiple token types together. Useful for blockchain games where you might want both unique items (NFTs for swords, armor) and fungible currency (in-game coins) from the same contract. More gas-efficient for large collections.

Other chains have similar standards. Solana has SPL tokens. Cosmos has IBC-compatible tokens. The principle is the same: a standard lets the broader ecosystem work with any conforming asset.

Token categories by function

Within the universe of tokens, several broad categories describe what the token actually does.

Utility tokens provide access to a service or product. The token is required to use a specific protocol or platform. Filecoin's FIL pays for decentralized storage. Brave's BAT pays content publishers in the Brave browser. The utility-token category is contested — many projects label tokens as utility when they functionally behave more like investments.

Governance tokens give holders voting rights in protocol decisions. UNI lets holders vote on Uniswap protocol changes. MKR governs MakerDAO. AAVE governs Aave. These tokens represent decentralized control of the protocol. The catch: governance tokens often also have significant value, leading users to acquire them for investment more than for participation.

Security tokens represent claims on revenue, assets, or other rights typically associated with traditional securities. The category is small in practice because regulators treat security tokens with full securities law — registration, accredited investor requirements, secondary market restrictions. Most projects avoid this category for that reason.

Stablecoins are tokens pegged to a stable value, typically the US dollar. We covered these extensively in Module 9. USDC, USDT, and DAI are the dominant examples.

Wrapped tokens are tokens that represent assets from another chain. Wrapped Bitcoin (WBTC) is an ERC-20 token on Ethereum backed 1:1 by Bitcoin held in custody. Lets Bitcoin holders interact with Ethereum DeFi without selling their BTC.

Meme tokens are tokens with no specific function beyond cultural reference and speculation. Dogecoin started as a joke; Shiba Inu followed. The category is real, durable in its way, but represents pure speculation.

The categories are not always cleanly separable. A governance token can have utility (you need it to interact with the protocol). A utility token can develop security-like characteristics if it accrues value from protocol revenue. Always look at what the token actually does in the system, not just what category the project's marketing assigns.

NFTs in 2026

The NFT category went through a famous boom-and-bust cycle in 2021-2022. Apes for $300,000. JPEGs trading for millions. Most of that activity has collapsed. NFT trading volume in 2026 is a small fraction of the 2021 peak.

But the category did not disappear. What changed is the use cases.

Profile-picture NFTs (PFPs) — the cultural artifact of the 2021 wave — are smaller, but specific collections (CryptoPunks, BAYC) retain meaningful floor prices and active markets. They function as identity tokens within crypto-native culture.

Generative art and digital art platforms (Art Blocks, Manifold) operate at smaller scale than peak but with sustainable economics. Artists are paid directly; collectors hold provable ownership.

In-game NFTs are the most-promising current category. Games that use NFTs for items, characters, or land let players own assets they can trade or use across compatible platforms. The category had a false start with play-to-earn (Axie Infinity, peaked 2021); the 2026 generation is more focused on actual gameplay with NFT integration.

Real-world asset tokenization — using NFT-like contracts to represent ownership of physical items (real estate titles, watches, art) — is small but growing. The infrastructure is mature; the legal frameworks are still catching up.

The lesson from the NFT cycle is the same as every other cycle in crypto. Speculation drives initial adoption, then collapses, leaving behind the use cases with genuine demand. NFTs are not what 2021 marketing claimed they were. But they are a useful primitive for a specific subset of use cases that involve unique ownership.

The practical takeaway

When you read a project announcement, the first questions are categorical:

Is this a coin or a token? If a coin, what blockchain secures it? If a token, what chain does it run on?

If a token, what category? Utility, governance, security, stablecoin? What does it actually do in the system?

If an NFT, what does the contract represent? Art, in-game items, identity, real-world asset?

Get the categories right and most marketing claims become easier to evaluate. Get them wrong and you can spend years confused about what you actually own.

The next and final module of Part 2 is the recap. Six modules into the ecosystem now. Time to consolidate what you know about the layers, the assets, the exchanges, and the yield mechanics — before Part 3 moves into the more interesting question of what actually gets built on top of all this.