Cryptocurrencies are digital money that operates without a central bank and records transactions in a public ledger—the blockchain. Instead of trusting an intermediary, they rely on mathematics, open-source code, and network consensus.
A brief history: from Bitcoin to EU regulation
The story begins on October 31, 2008, when Satoshi Nakamoto published the paper Bitcoin: A Peer-to-Peer Electronic Cash System, explaining how to solve the double-spending problem and build trust without a central authority. That document kick-started an entire digital-asset industry. Bitcoin has been running since January 2009 and became the first truly global cryptocurrency. Bitcoin: A Peer-to-Peer Electronic Cash System. (bitcoin.org)
In 2015, Ethereum arrived and added so-called “smart contracts”—programs that run on the blockchain. In September 2022, Ethereum switched from energy-intensive Proof-of-Work to Proof-of-Stake (the “Merge”), drastically reducing the network’s energy footprint and laying the groundwork for further scaling. Mainnet Merge Announcement – Ethereum Foundation Blog. (Ethereum Foundation Blog)
In 2024, another barrier was broken: the U.S. SEC approved trading of the first spot bitcoin ETP/ETFs on regulated U.S. exchanges, bringing Bitcoin even closer to traditional financial markets. Statement on the Approval of Spot Bitcoin Exchange-Traded Products. (SEC)
Meanwhile, in the European Union, the first comprehensive regulatory framework matured—MiCA (Markets in Crypto-Assets). The rules for stablecoins (ART, EMT) began applying on June 30, 2024, and the rest of the framework, including licensing for service providers, has applied since December 30, 2024. L_2023150EN.01004001.xml – EUR-Lex (Regulation (EU) 2023/1114). (EUR-Lex)
How blockchain works (in plain English)
A blockchain is a database of transaction blocks linked together by cryptographic “fingerprints” (hashes). Each new block confirms the previous one, making it extremely difficult to alter history retroactively. The network is run by thousands of nodes that agree on what’s true (consensus).
Proof-of-Work vs. Proof-of-Stake
- Proof-of-Work (PoW): security is provided by miners’ computational work (Bitcoin). The upside is robustness and simplicity; the downside is high energy use.
- Proof-of-Stake (PoS): security is provided by validators who “stake” their own coins (Ethereum after the Merge). The upside is dramatically lower energy consumption and better scaling prospects. Mainnet Merge Announcement – Ethereum Foundation Blog. (Ethereum Foundation Blog)
What you can do with cryptocurrencies today
- Store and transfer value: fast cross-border transfers without a bank.
- Smart contracts and DeFi: loans, exchanges, derivatives, or insurance running directly on the blockchain.
- Stablecoins: tokens pegged to € or $, reducing volatility and making payments easier.
- NFTs and digital identity: ownership of digital assets, tickets, or certificates.
- Tokenization of real-world assets: fund units, bonds, or commodities represented as tokens.
How to buy crypto (for beginners)
- Choose your route
- Centralized exchange (CEX): sign up, verify your identity (KYC), buy by card or SEPA bank transfer. Fees are typically ~0.1–2%, and SEPA is often €0–3.
- Decentralized exchange (DEX): no account—use your own wallet. The fee is “gas” (a network fee), and its € cost varies with network congestion.
- Payment and fees in euros
On a CEX, you top up your account in euros (SEPA is usually the cheapest) and then buy BTC, ETH, or another token. With card payments, expect an extra €1–3 and/or a percentage fee. - Secure storage
After buying, consider transferring to your own wallet (see below). For short-term trading, it can be practical to leave funds on the exchange, but doing so increases third-party custody risk.
Wallets: the seed phrase is everything
- Self-custody (non-custodial): apps (e.g., mobile) or hardware wallets. You control the seed phrase (12–24 words). If you lose it, you lose access.
- Custodial: an exchange/fintech handles storage. Easier to use, but you entrust the keys to a third party.
Tip: write your seed phrase on paper/metal—never photograph it and never store it in email or the cloud.
How transactions and “gas” work
Every transaction pays a network fee (e.g., “gas” on Ethereum), which incentivizes validators/miners to include it in a block. Speed and cost depend on network congestion; when activity is low it can be a few euro cents, while at peak times it can be several to tens of euros.
Regulation: what applies in the EU today (MiCA)
MiCA sets rules for token issuance, obligations for service providers (CASPs), and consumer protection. Stablecoins must meet strict capital and disclosure requirements, and as of 30 December 2024, broader licensing and supervision applies to exchanges, wallets, and custody services. L_2023150EN.01004001.xml – EUR-Lex (Regulation (EU) 2023/1114). (EUR-Lex)
Crypto and traditional finance: ETFs, banks, taxes
- Bitcoin ETF/ETP: in the U.S., spot products approved by the regulator (SEC) have traded since 10 January 2024. This enables BTC exposure without directly holding coins. Statement on the Approval of Spot Bitcoin Exchange-Traded Products. (SEC)
- Banking services: more and more fintechs offer buying and custody in line with MiCA.
- Taxation: in the EU, this is generally taxable income (profits from selling, staking, etc.). Specific rules vary by country—follow guidance from your local tax authority. This article is not financial or tax advice.
Risks to watch out for
- Volatility: prices can swing by tens of percent in a short time (don’t invest what you can’t afford to lose).
- Keys and scams: never send your seed phrase to anyone; watch out for fake “support” staff, bogus airdrops, phishing, and “too-good-to-be-true returns” schemes.
- Projects without fundamentals: not every token has real utility; check the white paper, team, audits, and liquidity.
- Regulatory changes: rules evolve; follow updates from official EU sources.
How to choose a cryptocurrency (decisive, but sensible)
- Purpose and use case: does the project solve a real problem?
- Technology and security: open source, audits, consensus model.
- Tokenomics: supply, inflation/deflation, token distribution.
- Liquidity and exchanges: whether you can buy/sell without large spreads.
- Community and development: active updates, roadmap, grants.
What to watch in 2025
- MiCA’s impact on the Slovak market: licensing of providers and banks’ approach to custody. L_2023150EN.01004001.xml – EUR-Lex (Regulation (EU) 2023/1114). (EUR-Lex)
- The post-Merge Ethereum ecosystem: scaling (rollups), lower fees for end users, the rise of “account abstraction.” Mainnet Merge Announcement – Ethereum Foundation Blog. (Ethereum Foundation Blog)
- Institutional adoption: crypto entering portfolios through regulated products (ETF/ETP). Statement on the Approval of Spot Bitcoin Exchange-Traded Products. (SEC)
Videos to help you understand (watch for free)
How Bitcoin Actually Works (3Blue1Brown)
An excellent visual animation covering everything from the basics to mining and signatures.
Blockchain Explained Simply (Simply Explained)
A short video that explains the idea of blockchain without jargon.
Mini glossary
- Blockchain: a chain of transaction blocks secured by cryptography.
- Seed phrase: 12–24 words used to restore a wallet; the key to your coins.
- Gas: a fee for computation and block space (especially on Ethereum).
- Smart contract: a program that executes automatically once conditions are met.
- Stablecoin: a token pegged to fiat (e.g., 1 € ≈ 1 token).
- DEX/CEX: decentralized/centralized exchange.
- Custody: safekeeping of private keys (either by you or by a third party).
FAQ (quick answers)
Is Bitcoin anonymous?
No, not entirely. It’s pseudonymous: addresses aren’t names, but the flow of funds is public.
What’s the minimum deposit?
On most exchanges, you can buy starting from €5–10. Watch out for fees.
Which cryptocurrency is the “best”?
It depends on the use case. Bitcoin is a proven store of value; Ethereum is a platform for smart contracts; other networks target specialized needs.
Can I lose everything?
Yes—due to user error (losing your seed phrase), a service hack, or a sharp market crash. Diversify and don’t underestimate security.
Sources
- Bitcoin: A Peer-to-Peer Electronic Cash System (Satoshi Nakamoto, 2008) – https://bitcoin.org/bitcoin.pdf
- Mainnet Merge Announcement – Ethereum Foundation Blog (2022) – https://blog.ethereum.org/2022/08/24/mainnet-merge-announcement
- Statement on the Approval of Spot Bitcoin Exchange-Traded Products – U.S. SEC (2024) – https://www.sec.gov/newsroom/speeches-statements/gensler-statement-spot-bitcoin-011023
- Regulation (EU) 2023/1114 (MiCA) – EUR-Lex/CELEX (applies from 30 June 2024 and 30 December 2024) – https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX%3A32023R1114
Robert
I’m interested in technology and history, especially true crime stories. For three years I ran a fact-based portal about modern history, and for a year I co-built a blogging platform where I published dozens of analytical articles. I founded offpitch so that quality content wouldn’t be hidden behind a paywall.
