What Is Cryptocurrency, Anyway?
Oobit
September 8, 2026
•
5
min read
If you've ever heard someone say "buy some crypto" as if Bitcoin, Ethereum, and USDC were all the same thing, relax: you're not the only one confused.
Here we'll break it down in a simple way: what a blockchain is, what a real cryptocurrency is, what a token is, and why "stablecoin" isn't all the same. Let's go?
Crypto Isn't All the Same
Think of it this way:
- BTC → native token of its own blockchain: the Bitcoin network. The blockchain was created specifically to operate Bitcoin, and BTC is the native asset of this network.
- ETH → native token of its own blockchain: the Ethereum network. But this one was built for much more than just moving ETH: it allows thousands of applications to run, such as DeFi protocols.
- USDC → token issued on multiple blockchains: it does not have its own blockchain. It is issued by Circle and can exist on different networks, such as Ethereum, Solana, and others. Its value aims to stay close to US$1 and is supported by the reserves that back the token.
- USDT → token issued on multiple blockchains: like USDC, USDT does not have its own Layer 1 blockchain. It is issued by Tether and can circulate on different networks, such as Ethereum, Tron, Solana, and others. Its value aims to stay close to US$1, being supported by the reserves that back the token.
In summary:
In other words: answering "what is cryptocurrency" requires separating these layers before citing names. Ignoring this difference is a recipe for misjudging risk and making mistakes.
The Networks (Blockchains): Each One Is a Different World
Before talking about each token, we need to talk about the blockchain. Each network has made different choices about how to function, and this directly changes the security, speed, and cost of everything that runs on each blockchain.
Let's get to know the four most cited networks in the market.
Bitcoin
- How it validates: mining (called Proof-of-Work), with a new block appearing approximately every 10 minutes.
- Purpose: To store and transfer value, a type of "global bank" without a bank.
- It wasn't designed to run Dapps: its language is intentionally simple, and solutions like the Lightning Network handle scaling payments externally.
- Native token: BTC, with a limited maximum supply and issuance that becomes scarcer over time according to the famous BTC halving.
Ethereum
- How it validates: Proof-of-Stake, changed its mining model in 2022, in an event called "The Merge".
- Purpose: Runs smart contracts, that is, programs that execute on their own, without anyone needing to press a button or trust an intermediary (Dapps).
- It is the historical basis of most DeFi, thanks to open token standards such as ERC-20 (tokens) and ERC-721 (NFTs).
- Native token: ETH, which serves both as a store of value and as (gas) to pay for transactions.
Solana
- How it validates: a mix of Proof-of-History (a "clock" that organizes events before consensus) with Proof-of-Stake.
- It was designed to process many transactions at the same time, with low fees.
- Native token: SOL is the native token of the Solana blockchain, just as ETH is the native asset of Ethereum. SPL is the standard used to create tokens on the Solana network, and not the name of the native token.
- Point of attention: the pursuit of speed has been linked, in the past, to episodes of network instability. It is worth remembering this when thinking about the risk, not only of the asset, but also of the infrastructure behind it.
Hyperliquid
- Proposal: a proprietary network designed to run a fully on-chain derivatives order book, with performance similar to that of a centralized exchange.
- It also has a layer compatible with smart contracts, which allows building DeFi DApps on top of the network's native liquidity.
- Native token: HYPE.
- Tip: as it is a newer and rapidly evolving ecosystem, it is always worth checking the updated official roadmap before making any technical or allocation decisions.
Summarizing the four networks:
Understanding this is the first step to answering "what is cryptocurrency" for real: it's not a single, generic block, it's the native token of a specific network, each with its own trade-offs in liquidity, cost, speed, and risk.
Token vs. Native Token
A token is different from a native cryptocurrency because it doesn't have its own network, validators, or consensus mechanism; the token simply "lives" within an already existing blockchain. In practice, it's code that follows a pattern (such as ERC-20 or SPL), which allows wallets, exchanges, and other dapps to interact with it without problems.
A token can represent very different things, for example:
- Governance: gives you the power to "vote" on important protocol decisions.
- Economic rights: gives you the right to a share of the generated fees, such as position tokens in a liquidity pool.
- Access: unlocks a specific function within an application.
- Value reference: it's a stablecoin.
Stablecoin: Not All "Stablecoins" Are Created Equal
USDC and USDT are the most famous examples of stablecoins, and both attempt to maintain parity with the dollar. However, "attempting to maintain parity with the dollar" can happen in very different ways, and this difference is proportional to the risk you are taking.
This last model has already caused serious problems in the market, with losses in the billions that became famous. So, every time someone says "it's a stablecoin," it's worth asking: "stable how, and backed by what?"
Why stablecoins are important for DeFi
A liquidity pool like ETH/USDT brings together a volatile asset with a stablecoin. In practice, this allows:
- Real-time pricing: the pair creates a market where the price of ETH is constantly discovered in dollar terms, directly on-chain.
- More efficiency: those providing liquidity don't need to leave the on-chain environment to have a stable reference.
- Free circulation: stablecoins circulate among lending protocols, decentralized exchanges (DEXs), and yield strategies, functioning as an important engine connecting the entire DeFi ecosystem.
Who's Who
Questions to Ask Before Dealing With Any Cryptocurrency
Note that this is a hierarchy, not a list of synonyms: every native cryptocurrency and every stablecoin is a "digital asset," but not every digital asset is a native cryptocurrency, and not every token is a stablecoin.
- What is the blockchain? This defines liquidity, transaction costs, and which dapps you can access.
- What is the asset? Native token, protocol token, or stablecoin; each with a different logic.
- What is it used for? Store of value, paying transaction fees, providing governance power, or serving as a stable unit.
- Where is it stored? On an exchange (custodial), in your own wallet (self-custody), or deposited in a DeFi protocol (which adds another contract risk).
- What is the predominant risk? Volatility, smart contract risk, liquidity risk, issuer risk (in the case of stablecoins), or network bridge risk.
No single question tells the whole story; the real risk of a position only appears when you put all five answers together.
The Risks Nobody Tells You Upfront
- Network risk: interruptions, congestion, or excessive concentration of validators vary considerably between Bitcoin, Ethereum, Solana, and Hyperliquid. The security of an asset is never greater than the security of the network that hosts it.
- Bridge risk: "Encapsulated" versions of an asset on another network (like BTC represented on another blockchain, such as WBTC on the Ethereum network) depend on the security of the bridge mechanism, one of the favorite targets of hacker attacks in the crypto world.
- Centralized issuer risk: fiat-backed stablecoins depend on the solvency, governance, and transparency of the issuer's reserves, representing a very different risk from common market risk.
- Token pattern confusion risk: sending a token to an incompatible address or network is one of the most frequent causes of irreversible loss of funds. Always double-check before sending.
Summary
Understanding blockchain, native tokens, tokens, and stablecoins is what gives you the security to move on to the next stage of the journey: the interface between you and the on-chain world is your wallet.
This article did not intend to list everything that exists in the crypto universe (that would be impossible, given the pace of creation of new projects in the on-chain world). The idea was to give you a stable mental model: when faced with any new asset, you can already ask yourself which category it fits into and run the checklist of 5 questions before making any decision.
In the end, the question that opened this article, "what is cryptocurrency," no longer has a single answer and depends on the layer in which the asset is located, the network that hosts it, and the function it fulfills.
Keep it simple
- Distributed consensus: the way the network agrees, among everyone, on what the "true" version of the ledger is — without needing a boss in the middle.
- Proof-of-Work (PoW): validates transactions using computing power (mining).
- Proof-of-Stake (PoS): validates transactions using capital deposited (stake) by validators.
- EVM: the "engine" that runs smart contracts on Ethereum and compatible networks.
- ERC-20 / SPL: the standard "templates" for creating tokens on Ethereum and Solana, respectively.
- Depeg: when a stablecoin loses parity with the asset it should track.
- Wrapped asset: a version of an asset issued on another network, different from the original, backed 1:1.
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