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What Is Cryptocurrency?

What Is Cryptocurrency?

Section titled “What Is Cryptocurrency?”

You’ve probably split a bill with an app, or sent a few quid to a market stallholder with a tap of your phone. The money moved in seconds, and a bank quietly sat in the middle making sure both sides agreed. Cryptocurrency does the same job of moving value between people, but it swaps that bank for something closer to how a well-run community already works: everyone keeping a shared, honest record together.

If you organise gardens, run a tool library, or hold a seed swap, that idea is already in your bones. Here’s what cryptocurrency actually is, why it might matter for your real work, and how to tell the useful parts from the hype.

The Short Version

Section titled “The Short Version”

Cryptocurrency is money that exists only as digital records, and that people can send directly to each other without a bank or company sitting in the middle. “Crypto” is short for cryptography, the maths that locks each transaction so it can’t be forged or quietly rewritten.

The first cryptocurrency, Bitcoin, launched in 2009. Today there are thousands of others, but they all share that core idea: a shared record, kept by a crowd, that no single party owns.

The Shared Notebook

Section titled “The Shared Notebook”

Picture your seed library’s lending notebook. When someone borrows a packet of tomato seeds, you write it down. Now imagine everyone in the collective holds an identical copy of that notebook. Every new entry gets added to all the copies at once, and once an entry is written and everyone agrees on it, nobody can rub it out.

That shared, tamper-resistant notebook is a blockchain: a record of transactions copied across thousands of computers, where new entries can be added but old ones can’t be secretly changed.

This is the heart of it. As one plain-language explainer puts it: if you own cryptocurrency, you don’t own anything tangible. What you own is a key that lets you move a record from one person to another, with no trusted third party in between. Your wallet holds that key. The network holds the notebook.

The grown-up word for this is decentralisation: no single bank, company, or government runs the system. The same instinct that makes a farmers’ market work without a central boss setting every price is the instinct behind a blockchain.

Coins vs. Tokens

Section titled “Coins vs. Tokens”

You’ll hear two words used loosely, so it helps to separate them.

A cryptocurrency (or “coin”) is the native money of its own blockchain: Bitcoin on the Bitcoin network, ether on Ethereum. A token is something built on top of an existing blockchain for a specific purpose, using the network’s plumbing rather than running its own.

Tokens are the part most relevant to community work, because they behave like the local currencies and barter credits you may already use. Think of a tool-library credit, a volunteer-hours token, or a share in a community-supported agriculture box. The community sets the rules; the blockchain just keeps the count honest. You don’t need a bank to issue them.

Why This Might Matter for Your Work

Section titled “Why This Might Matter for Your Work”

The honest answer to “why should I care?”: you almost certainly don’t need crypto, and be suspicious of anyone who says you do. But a few real projects show where it genuinely helps the kind of work you do.

Local currencies that survive a cash drought. Grassroots Economics in Kenya runs the Sarafu Network, a community currency that lets neighbours trade goods and labour when national cash is scarce. It reports supporting more than 26,600 people across 290+ communities, and it now runs on a low-energy blockchain called Celo. It’s a digital version of the mutual credit that’s powered communities for centuries.

Paying growers directly, without the middle layers. Regen Network lets land stewards register regenerative projects and issue ecological credits for measured outcomes like soil carbon, then sell them to buyers. It connects the people doing the work to the people funding it, instead of routing through several layers of brokers who each take a cut.

Giving that funds itself. Glo Dollar is a nonprofit digital dollar: the reserves backing it sit in cash and safe US government bonds, and the interest those reserves earn is donated to charities the holder chooses. A major recipient is GiveDirectly, which hands cash straight to people in extreme poverty. Holding it routes money to good causes at no cost to you.

Sending value across borders cheaply. Sending money home through a traditional money-transfer service costs about 6% of the amount on average worldwide, and often more, according to the World Bank. A stable digital dollar sent on a low-cost network can cost a cent or two. For diaspora communities and cross-border solidarity funds, that gap is real money.

Addressing the Fears Head-On

Section titled “Addressing the Fears Head-On”

“Isn’t this terrible for the planet?” It depends entirely on which blockchain. Bitcoin still uses proof of work, a system that secures the network by burning electricity. The Cambridge Centre for Alternative Finance put its consumption at about 138 terawatt-hours a year in its April 2025 study, roughly 0.5% of global electricity use, or about what a country the size of Norway gets through. But in 2022 Ethereum switched to proof of stake, which secures the network without the energy race, and cut its electricity use by about 99.95% overnight. Most newer chains work this way, including Celo, the one the projects above use. “Crypto wrecks the climate” was largely a Bitcoin story. Judge each project by the chain it runs on.

“Won’t I get scammed or look foolish?” Scams are real, and healthy caution is exactly the right instinct. The rule that protects you is simple: a legitimate project never pressures you, never promises guaranteed returns, and never needs your secret key or recovery phrase. Anyone who asks for those is robbing you. You can learn how all of this works without ever spending a penny.

“Is this just hype that wastes my time?” Plenty of it is. You don’t have to become a trader, and understanding the idea costs you nothing. The value isn’t speculation. It’s recognising the cooperative patterns underneath, the same ones in seed swaps and mutual aid, and knowing a tool exists if your community ever needs it.

Try This

Section titled “Try This”

Start here: Spend ten minutes on Bankless Academy’s free crypto basics lessons. No money required, just a clear walkthrough you can stop anytime.

Go deeper: Install a free wallet app like Coinbase Wallet or MetaMask and simply look around. Don’t buy anything. Notice how an address works and how a transaction would appear. Treat it like visiting a new tool library before you borrow.

Stretch: Read how the Sarafu Network or Regen Network actually runs, then sketch one page on whether a community token could help a group you’re part of, and, just as honestly, where a plain spreadsheet would do the job better.

References

Section titled “References”