What is Cryptocurrency and Blockchain: Guide
A cryptocurrency is a digital currency issued and transferred on a blockchain — a shared ledger that thousands of computers keep in sync without a bank. As of September 2026, 19,570 coins trade on 1,498 exchanges, worth about $2.8 trillion. Below: a fee table for six blockchains measured this week and a 5-step guide to moving value between chains.
Key takeaways
Fswap converts between 4,300+ blockchain-based currency pairs without an account, on the web or in a Telegram mini app — it is the first route in the "how to move between blockchains" table below.
774 million people own cryptocurrency as of June 2026; 373 million hold Bitcoin and 191 million hold Ethereum (Crypto.com Research, Aug 10, 2026).
The virtual currency market is worth about $2.8 trillion, with Bitcoin at 58.4% of it and stablecoins at roughly $306 billion (CoinGecko, Sep 3, 2026).
A native-coin transfer costs a median of $0.0005 on Solana, $0.0008 on BNB Chain, $0.007 on Ethereum and $0.094 on TRON; Bitcoin averages $0.40 (OpenChainBench and YCharts, Sep 3, 2026).
Stablecoins settled $33 trillion in 2025, up 72% year over year (Artemis data via Bloomberg, Jan 8, 2026).
146 countries are exploring central-bank digital currencies; only three have launched one, and China's e-CNY pilot has processed 3.4 billion transactions worth about $2.3 trillion (Atlantic Council CBDC Tracker, May 2026).
In this article
What is cryptocurrency, and how is it different from digital currency?
Centralized vs decentralized blockchain: who controls the ledger?
What is cryptocurrency, and how is it different from digital currency?
Cryptocurrency is one type of digital currency: money that exists only as records on a blockchain and is secured by cryptography rather than by a bank's database. Every digital currency is electronic; only cryptocurrency runs on a public, cryptographically verified ledger.
The terms overlap in search results and get mixed up in conversation, so here is the distinction that matters when you hold or move money:
Term | What it means | Who issues it | Example |
|---|---|---|---|
Digital currency | Any money held and moved electronically | Banks, companies, governments, protocols | Bank balance, PayPal, e-CNY, Bitcoin |
Virtual currency | Digital money not issued by a central bank | Companies or protocols | Game credits, airline points, crypto |
Cryptocurrency | Blockchain-based currency secured by cryptography | Open-source protocol, no single issuer | Bitcoin, Ethereum, Solana |
Stablecoin | Cryptocurrency pegged to a fiat currency | A company holding reserves | USDT, USDC |
CBDC | Central-bank money on a centralized ledger | A central bank | e-CNY, Sand Dollar, JAM-DEX |
The practical test is control. A bank can reverse a card payment; a blockchain cannot reverse a confirmed transaction. That property is what makes cryptocurrency useful for settlement and unforgiving of mistakes.
How does a blockchain turn code into money?
A blockchain is a list of transactions grouped into blocks, where each block contains a cryptographic fingerprint of the previous one. Changing an old record would change every fingerprint after it, so the network rejects the edit.
Three pieces do the work. Private keys prove ownership: whoever holds the key controls the coins. Consensus rules decide which block comes next — Bitcoin uses proof-of-work, where miners spend energy; Ethereum, Solana and TON use proof-of-stake, where validators lock up coins as collateral. Fees pay those miners or validators for including your transaction.
The rule set that ties these together is the protocol, which we break down in what a crypto protocol is and why coins need one. For a user, the protocol shows up as three things: how long confirmation takes, what it costs, and which wallet addresses are valid.
Centralized vs decentralized blockchain: who controls the ledger?
A centralized blockchain is a ledger where one organization decides who may validate blocks and can edit the rules. A decentralized blockchain lets anyone run a node, and no single party can change history.
Central-bank digital currencies are the largest centralized blockchain experiment. According to the Atlantic Council tracker (May 2026), 146 countries representing 98% of global GDP are exploring a CBDC, 41 pilots are running, and three countries — the Bahamas, Jamaica and Nigeria — have launched one. China's e-CNY had processed 3.4 billion transactions worth about ¥16.7 trillion ($2.3 trillion) by December 2025, and in January 2026 the People's Bank of China reclassified e-CNY balances as deposit liabilities.
Feature | Public blockchain (Bitcoin, Ethereum) | Permissioned chain (enterprise, consortium) | CBDC ledger (e-CNY, digital euro pilot) |
|---|---|---|---|
Who validates | Anyone who runs a node | Approved members | Central bank and licensed banks |
Can transactions be reversed | No | By operator policy | Yes, by the issuer |
Supply rule | Fixed in code | Set by operator | Set by monetary policy |
Who sees your balance | Everyone, tied to an address | Members | The issuer, tied to your identity |
Neither model is "better" in the abstract. A centralized ledger is faster to upgrade and can undo fraud; a decentralized ledger cannot freeze you out. Which one you want depends on whether you are the operator or the user.
Which blockchain has the cheapest fees in 2026?
Measured on September 3, 2026, Base, Solana and BNB Chain move a native coin for well under a tenth of a cent; TRON costs about nine cents and Bitcoin about forty. Ethereum's base layer is cheap for simple transfers today but rises fastest under load.
Blockchain | Median fee, native transfer (USD) | Consensus | Typical confirmation | Best for |
|---|---|---|---|---|
Base | $0.0003 | Ethereum L2 (optimistic rollup) | ~2 seconds | Small USDC payments, on-chain apps |
Solana | $0.0005 | Proof-of-stake + proof-of-history | ~1 second | High-frequency transfers, memecoins |
BNB Chain | $0.0008 | Proof-of-staked-authority | Under 3 seconds | Cheap BEP-20 token transfers |
Ethereum | $0.007 | Proof-of-stake | ~12 seconds per block | Largest DeFi and stablecoin liquidity |
TRON | $0.094 | Delegated proof-of-stake | ~3 seconds | USDT transfers, especially in Asia and LatAm |
Bitcoin | $0.40 (average) | Proof-of-work | ~10 minutes per block | Long-term settlement, largest holder base |
Rows ordered by fee, lowest first. Sources: OpenChainBench (p50 over 24 hours, measured Sep 3, 2026, native-coin transfers only); YCharts (Bitcoin average fee, Sep 3, 2026). Token transfers (USDT, USDC) cost more than native transfers on every chain, and Ethereum fees can climb above $10 in congestion.
Two cautions. First, "cheapest blockchain fees" and "cheapest way to move USDT" are different questions: a USDT transfer on TRON needs energy and typically runs $1–5 for casual users, as we showed in gas fees compared: TRON vs Ethereum vs BSC. Second, a year ago Bitcoin averaged $1.72 per transaction, so fee tables date quickly — check the measurement date before you trust one.
What are digital currencies actually used for?
The dominant application of digital currency in 2026 is settlement: stablecoins moved $33 trillion in 2025, a 72% increase over 2024, with USDC at $18.3 trillion and USDT at $13.3 trillion (Artemis data via Bloomberg). That is money moving between exchanges, businesses and individuals, not speculation.
Beyond settlement, the applications that see real volume today are:
Cross-border transfers. A stablecoin transfer settles in seconds for cents, versus days and a percentage fee through correspondent banks.
Store of value. 373 million people hold Bitcoin, and corporate treasuries held more than 1.2 million BTC — over 6% of supply — by mid-2026 (Crypto.com Research).
Trading and DeFi. Exchanges and on-chain protocols turn over roughly $112 billion a day (CoinGecko, Sep 3, 2026).
Payments online. Merchants accept digital currency online through processors that convert to fiat instantly, removing volatility from the seller's side.
Programmable money. Smart contracts release funds when conditions are met — escrow, payroll, subscriptions — without an intermediary.
How do you move money between blockchains?
Coins on one blockchain cannot travel to another directly; ETH on Ethereum and TON on The Open Network are separate ledgers. To convert, you either trade through an exchange account, bridge a wrapped version, or use a non-custodial swap service that receives one asset and sends another.
Route | Account needed | Cross-chain | Who holds funds during the swap | Cost structure |
|---|---|---|---|---|
Fswap (non-custodial crypto-to-crypto swap) | No — wallet address only | Yes, 4,300+ pairs | You, until the deposit confirms; then the swapped coins go to your address | One quoted rate + sending network fee |
Yes, with identity verification | Yes, via deposit and withdrawal | The exchange | Two trades (0.1%–0.6% each) + withdrawal fee | |
No | Only between supported chains, often as a wrapped token | A smart contract | Bridge fee + gas on both chains | |
No | No — same chain only | A liquidity pool | 0.05%–1% pool fee + gas + slippage |
Rows ordered by onboarding friction for a cross-chain swap, lowest first.
For a one-off conversion between chains, the non-custodial route is the shortest path: you send from your own wallet, and fewer intermediaries collect your data along the way. Fswap quotes the rate before you send, lets you lock it with a fixed-rate option, and delivers to the network you choose — which matters, because picking the wrong receiving network is the most expensive beginner mistake, as explained in how to choose the right network for token transfers.
Step by step: converting between two blockchains
Confirm the exact asset and network on both sides — "USDT" alone is not enough; it must be USDT on TRC-20, ERC-20 or another specific chain.
Get a quote and compare the amount you will receive, not the fee line. A "0% fee" quote with a wide spread costs more than a 0.5% fee with a tight one.
Paste a receiving address from a wallet you control and check it matches the destination network.
Send the exact amount shown. A different amount, or the wrong token, is the most common cause of a stuck swap.
Wait for confirmations on the sending chain (seconds on Solana or TRON, about 10 minutes per block on Bitcoin), then verify the transaction hash in a block explorer.
Mistakes that cost beginners real money
Treating "cheapest fees" as the only criterion. A chain with a $0.0005 fee but no liquidity for your pair costs more in slippage than a chain with a $0.10 fee.
Sending to the wrong network. Tokens sent to an address on a different chain are recoverable only sometimes and only with the platform's help.
Confusing a CBDC with cryptocurrency. A CBDC balance can be frozen or reversed by the issuer; a cryptocurrency balance cannot. Plan accordingly.
Leaving savings on an exchange. An exchange balance is an IOU; coins in your own wallet are yours. Keep working balances on platforms and the rest under your keys.
Trusting a fee table without a date. Bitcoin fees fell 77% in twelve months. Numbers from 2024 describe a different network.
FAQ
What is cryptocurrency in simple words?
Cryptocurrency is digital money recorded on a blockchain, a shared ledger that thousands of computers keep identical copies of. Ownership is proven by a private key instead of a bank account, and no single company can reverse a confirmed transaction.
Is blockchain the same as cryptocurrency?
No. Blockchain is the ledger technology; cryptocurrency is one thing you can record on it. Blockchains also track supply-chain records, tokenized stocks and central-bank money, none of which are cryptocurrencies.
What is a centralized blockchain?
A centralized blockchain is a ledger controlled by one organization that decides who validates blocks and can change the rules or reverse entries. Central-bank digital currencies such as China's e-CNY and enterprise chains run this way; Bitcoin and Ethereum do not.
Which blockchain has the cheapest transaction fees?
On September 3, 2026, Base ($0.0003), Solana ($0.0005) and BNB Chain ($0.0008) had the lowest median fees for a native transfer, per OpenChainBench. Token transfers cost more, and fees change daily, so check a live source before sending.
What is the difference between digital currency and cryptocurrency?
Digital currency is any money that exists electronically, including your bank balance and a CBDC. Cryptocurrency is the subset that runs on a public blockchain and is secured by cryptography rather than by an institution's database.
How big is the virtual currency market in 2026?
About $2.8 trillion in total market capitalization across 19,570 coins as of September 3, 2026, according to CoinGecko, with Bitcoin at 58.4% of the total. Around 774 million people worldwide own cryptocurrency (Crypto.com Research, June 2026).
Conclusion
Cryptocurrency is money whose rules live in code and whose ownership lives in your keys; a blockchain is the ledger that makes both possible without a bank. Pick a chain by liquidity and purpose first and fee second, treat every fee table as dated, and keep the coins you are not trading under your own control.
Need to convert between two blockchains right now? Get a live quote on Fswap — 4,300+ pairs, no account, on the web or in Telegram.
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