What Is Cryptocurrency?

How Does Cryptocurrency Work?

Crypto transactions are completely decentralized, which means they operate without financial institutions overseeing each transaction. Users purchase their coins from a cryptocurrency exchange, store them in specialized wallets, and verify transactions on the blockchain, which serves as the base of it all.

The Blockchain: Crypto’s Foundation

As the phrasing itself suggests, the blockchain technology is a sequence of cryptographic blocks bound together by a unique digital mark (a cryptographic hash). Think of it as a group ledger of every crypto transaction ever made.

Each block of transactions follows the previous one, and once complete, they’re permanently sealed. Think of it as a Google Doc document shared with millions of people, only with viewing access. People would be able to see it, but no one would have permission to change the slightest thing on the document.

Unlike banking systems, where financial institutions control the payment network, the blockchain isn’t controlled by anyone. For a new block to be added, the entire network of nodes (think computers and processors) within the blockchain must reach consensus. Consensus rules validate transactions, which can be traced on the blockchain, but they are never altered.

Cryptography: How Transactions Stay Secure

One’s crypto holdings are stored within a cryptocurrency wallet, which can be used for secure transactions on the blockchain. While physical wallets also exist, most holders use a digital wallet, which comes with a unique string of symbols and digits that represent the wallet address.

It’s the public key of your wallet, which can be seen by anyone. In fact, it should be seen and shared with those sending you cryptocurrency payments. There’s also a private key, which is the other side of the coin. It’s your proof of ownership over a wallet, and you must never post it online or share it with anyone. This way, you get complete payment security; your wallet creates a digital signature.

Types of Cryptocurrencies

Cryptocurrency is a general term that’s often used interchangeably for any form of virtual currency. Crypto assets may include anything from coins to tokens and altcoins, and here’s an overview of the subtle differences:

Coins

Simply put, crypto coins are native currencies of their respective blockchains. In fact, such coins fuel the computations processed on their networks. Bitcoin is the perfect example, as it exists only on the BTC blockchain.

That means you can only send and receive coins via the BTC blockchain technology, also called the BTC network. Ethereum is another instance; it can be sent and received on the Ethereum network, and the pattern repeats for the underlying network of each coin.

Tokens

Unlike coins, tokens don’t have their own blockchain. Instead, they are built on existing blockchains of coins like Ethereum, using its ERC-20 standard for tokens. In other words, they’re piggybacking on different blockchain infrastructures.

Utility tokens are devised as currencies within a specific ecosystem, such as an app, while governance tokens give holders voting rights in their ecosystems. So, holding enough tokens of a decentralized finance (DeFi) platform would give you voting rights on the platform’s further development.

Stablecoins

One of the main issues of cryptocurrency investing and transfers as a whole is the conversion. Coin values can change frequently, even with major currencies like Bitcoin or Ethereum. That’s why stablecoins come in and bridge that gap by being pegged to stable assets, mainly the US dollar. That’s the case with currencies like USDT and USDC, where 1 USDT would be worth exactly 1 USD.

Some stablecoins are fiat-backed, which means there are actual reserves of USD to back each transaction. On the flip side, algorithmic stablecoins use code rather than reserves to maintain their peg and carry significantly higher risk. The collapse of TerraUSD (UST) in 2022 erased tens of billions in value and led to widespread regulatory scrutiny.

Altcoins

While still the most popular cryptocurrency to this day, Bitcoin is fairly limited in terms of transaction speed and fees. That led to the rise of altcoins, which are pretty much all other coins except for BTC.  You can check our full altcoins guide to learn more about each, but the main thing is their range from reputable options like Ethereum and Solana to meme coins.

What Makes Cryptocurrency Different from Traditional Money?

Cryptocurrency isn’t just a substitute for fiat money; it’s a better option for those who’d like to avoid the slow and costly bank or card network transfers. Some of the things that make it so different include:

• Decentralization: Crypto’s decentralized nature is what fuels cryptocurrency investments and transfers. Unlike traditional financial systems, there’s no central authority controlling the network. Though crypto markets remain highly volatile and are not immune to price crashes.
• Borderless & Permissionless: Cryptocurrency is a medium of exchange spread worldwide, allowing employees from one country to receive payments from another without any currency conversion or pending periods.
• Transparency: All transfers processed on crypto networks are recorded for everyone to see, which is the level of transparency that traditional payment systems might never reach.
• Ownership: As you’re the only one with a private key to your wallet, you’re the true owner of your crypto assets.
• Programmability: Cryptocurrency transfers work on smart contracts that execute when specific terms are met (e.g., someone sends you a transfer). That means there are no intermediaries that take their cut or slow down transaction times.

Of course, the cryptocurrency market also comes with compromises. It’s highly volatile, with constant shifts in the coin/token value, regulatory changes, and a learning curve behind crypto transfers, which can be an important limitation for some.

How Is Cryptocurrency Created?

Now you know that cryptocurrencies run on a decentralized payment system, unlike traditional banking. And when it comes to creating cryptocurrency, there are two main methods, though some coins are simply pre-minted at launch and distributed via sales or airdrops.

Proof of Work (Mining)

You’ve probably heard of Bitcoin mining before, which is when holders use specialized computers to complete complex mathematical puzzles. Solving each adds a new block to the blockchain, but it consumes electrical power and processing capacity.

Proof of Stake (Validation)

Unlike BTC, other coins like Ethereum use proof of stake. In fact, ETH switched from mining to validation in 2022, making it the perfect example to showcase the difference. As a validator, you’d lock up your own crypto as collateral, and the network algorithm would propose and verify blocks based on stake size. What’s good about this is that it uses way less computational power, and if any sort of malicious behavior is detected, the network would take away your staked coins.

How to Get Cryptocurrency

Mining is just one of the ways in which you can replenish your crypto stash. Here’s a summary of all the ways you can get crypto:

Buying on an Exchange

As a holder, you can buy and sell crypto on specialized exchanges. For instance, if you’re on the market for some BTC, your main question might be how to buy Bitcoin. Well, it can be as simple as visiting the exchange, creating an account, and switching fiat for crypto or other crypto for BTC.

Regulated exchanges like Coinbase, Kraken, or Binance are all vetted options, but they require you to sign up and pass a KYC check, which might strip the anonymity factor away. Such assets also require a wallet in a digital or physical form for safe storage. Some exchanges, like Binance, also have custodial wallets, which means the exchange holds the keys for you. A non-custodial wallet is a more secure option, as you’d be the only one in control of the keys.

Earning Crypto

Another way of getting crypto is through earning or staking. When you stake crypto, you lock certain coins or tokens up for a specified period, and that generates a yield and a return in the form of newly acquired crypto. These days, DeFi platforms provide crypto staking options, and you can even get some benefits like crypto cashback cards.

Mining

Mining is reserved for those with advanced technical knowledge of crypto mining requirements. As an example, mining Bitcoin at home isn’t that profitable, as the costs of running ASIC mining rigs and paying electricity bills often exceed the earnings for individual miners. It’s more accessible for obtaining Proof of Work altcoins.

Where to Buy Cryptocurrency

Visiting an exchange would be the way to go if you’d like to compare crypto prices and buy some coins or tokens. Still, it’s also possible to purchase crypto on other platforms, so here’s a full overview:

1. Centralized Exchanges: Most holders consider centralized platforms like Coinbase, Binance, or Kraken to be the best crypto exchanges for beginners, due to regulatory protection and a smooth overall experience.
2. Decentralized Exchanges: Decentralized platforms like Uniswap or Jupiter are best for seasoned, self-custody users looking for no KYCs and no sign-up procedures attached.
3. Brokers & Apps: Platforms like Revolut, PayPal Crypto, or eToro are the simplest options for beginners, but they charge usage fees and often feature a limited range of crypto assets you can buy.
4. Peer-to-Peer Platforms: P2P marketplaces let users buy and sell directly with each other, with the platform providing escrow and dispute resolution. Fees are usually lower than card payments but still apply, and prices vary by seller.

What Is Cryptocurrency Used For?

Cryptocurrency isn’t here to replace fiat options. It’s here to make it easier for consumers to access products and services they’d otherwise struggle to get, all while making online payments quicker.

As a Currency & Payment Method

International payments show the practicality of crypto in true light. Imagine having to send $500 from the UK to Venezuela in a bank transfer. Not only would the recipient have to wait for days to receive the funds, but the costs would also likely be higher, including tax payments and a wire transfer fee usually ranging from $15 to $50, depending on the bank and location.

With crypto transfers, you’d just have to pay network transaction fees or gas fees, which are way lower, especially with currencies like Litecoin. Cryptocurrencies are also getting globally recognized as an international payment method. For example, El Salvador became the first country to adopt Bitcoin as legal tender in 2021, though it amended the law in 2025 to make merchant acceptance voluntary following an IMF agreement. Nowadays, beyond payments, they are increasingly used across digital finance, including for crypto gambling. As with any financial activity, it’s important to understand the risks involved and gamble responsibly before using crypto in this area.

As an Investment Asset

Investors also use cryptocurrencies to diversify their portfolios, as crypto is treated as a digital asset. In most cases, crypto investors purchase major coins like Bitcoin, which is commonly referred to as “digital gold.” It earned such status after years of decently keeping its value at a high level, but critics note it lacks gold’s physical properties and industrial demand.

That being said, the crypto market is volatile, and the price of all the coins that aren’t pegged to a dollar constantly shifts. Still, that didn’t prevent holders from supporting crypto businesses, and some companies hold large amounts of cryptocurrency on their balance sheets, often called corporate crypto treasuries.

Is Cryptocurrency Safe?

The networks themselves are very hard to tamper with. Once a block is confirmed, rewriting it would mean overpowering the whole network that secures the chain, either by out-computing every miner on a Proof of Work chain like Bitcoin or by controlling most of the staked coins on a Proof of Stake chain like Ethereum. Both are extraordinarily expensive, which is what keeps the ledger trustworthy. But smart contract vulnerabilities, attacks on smaller networks, and platform-level hacks remain real risks. Most losses happen through exchange breaches, phishing, and user error.

• Only use reputable exchanges and avoid shady platforms.
• Enable two-factor authentication (2FA) and other safety standards.
• Keep your private key to yourself and don’t expose it online.
• Consider using a hardware wallet to safely store larger crypto amounts.

Risks and Common Scams to Watch Out For

Our experts take crypto payment security seriously and provide awareness of the most common risks and scams in our Tradeblock guides; the common ones are as follows:

• Rug Pulls: Scammy developers tend to drain all the liquidity out of previously hyped-up project launches.
• Phishing: Fake websites resembling exchanges or other platforms might make you willingly expose your private keys.
• Pump-and-Dump: Shady groups might artificially rack up the coin’s price via social media or other channels, only to take money from investors and leave them with worthless tokens.
• Fake Giveaways: If you run upon crypto giveaways, chances are they’re a scam. You’ll rarely run upon vigilantes willingly gifting their coins to the impoverished.
• Romance/Investment Scams (Pig-Butchering): Scammers are often so persistent that they pursue targets for weeks via dating or chatting apps, only to try to make you invest in their schemes.

Tax & Regulation: Is Cryptocurrency Legal?

Potential holders often ask around for legal or tax advice before obtaining their first crypto assets. Here’s what you need to know about the latest standings:

Legality

It’s always worth checking crypto regulation by country before buying any coins, as these vary quite a bit. For instance, it’s legal and partially regulated in the US, EU, and UK, but countries like China are still strictly against the legalization of crypto as a payment method. Even so, movements like the EU’s Markets in Crypto-Assets (MiCA) framework seem promising enough, legalizing exchanges and stablecoin issuers in 27 countries.

Taxes

You should also consult a professional to give you a rundown of the crypto tax guide in your country before buying any coins. Just a few years back, holders weren’t required to pay any tax on crypto assets. These days, the rules have changed, as now most jurisdictions treat crypto as a taxable asset, but the regulations vary by region.

Final Words: Getting Started With Cryptocurrency

Whether you’re considering becoming a holder or just checking in to see what’s new in the crypto world, cryptocurrency is an asset worth understanding. It makes everyday transfers smoother and faster, with relatively low payment fees when compared to wire-transfer costs. We’re also aware of how tough it can be to get into a completely new asset class, its regulatory uncertainty, steep learning curve for new holders, irreversible transactions, and high price volatility. We recommend only using reputable exchanges, following safety standards, using a hardware wallet, and avoiding sharing your private key.