Money, cryptography, the blockchain and the future of financial freedom. A complete 12-module study guide.
Money is not something natural. It does not exist in nature like water or oxygen. It is a social technology: a collective agreement that a certain thing has value because we all believe that everyone else believes it too. That circularity is its essence.
Before money there was barter. If you were a fisherman and needed shoes, you had to find a shoemaker who needed exactly fish. Economists call this the double coincidence of wants — and it is brutally inefficient. Money was born to break that chain.
To fulfil those functions well, money needs certain properties. Historically, no good has met all of them perfectly — until Bitcoin:
When you deposit €1,000 in a bank, the bank does not keep it. It keeps only a fraction (in Europe the requirement is ~1%) and lends out the rest. The bank that receives that loan does the same. This is how money is "created" out of nothing: from €1,000 of real deposit, up to €100,000 in credit can circulate through the economy.
Central banks (the Fed, the ECB) can create money directly by buying assets with newly created money. Between 2020 and 2022 alone, the Fed expanded its balance sheet from 4 to more than 9 trillion dollars. That money did not exist the day before.
| Project | Year | Innovation | Why it failed |
|---|---|---|---|
| DigiCash (Chaum) | 1989 | First private digital cash | Centralised company. Went bankrupt in 1998. |
| E-Gold | 1996 | Digital gold. 5M users | Seizable physical servers. Shut down by the U.S. in 2007. |
| Liberty Reserve | 2006 | Global anonymous payments | Registered company. Dismantled in 2013. |
| b-money (Wei Dai) | 1998 | Decentralised proposal | Never fully implemented. |
| Bit Gold (Szabo) | 2005 | Design almost identical to Bitcoin | Did not solve the double-spending problem. |
Satoshi read all of this. Bitcoin responds directly to every failure: no company, no central servers, no leader to arrest, no physical address to seize.
Whoever controls money controls behaviour. History is full of examples: the Argentine "corralito" (2001), the seizure of deposits in Cyprus (2013), the freezing of Canadian truckers’ accounts (2022), the financial blockade of WikiLeaks (2010).
Bitcoin is the first technology in history that lets anyone in the world store and transfer value without anyone’s permission. It requires no bank, no government and no name.
In Bitcoin, these four problems are solved mathematically, with no need to trust any central institution.
Julius Caesar sent military messages by shifting each letter of the alphabet three positions. 'A' → 'D', 'B' → 'E'. It has only 25 possible keys. The underlying principle is the same as all modern cryptography: turning plaintext into ciphertext using a key.
A rod of a specific diameter for encrypting messages by wrapping leather around it. The first example of a transposition cipher in history.
Germany used Enigma in World War II — a machine with more than 158 quintillion possible combinations. Alan Turing led the team that broke it. It is estimated to have shortened the war by 2 to 4 years. Without Turing there would be no modern computing, and without computing there would be no Bitcoin.
All historical ciphers shared one problem: the recipient needs the key to decrypt, but how do you send it securely if the channel is not secure? It is the chicken-and-egg dilemma.
They proved mathematically that two people could establish a shared secret key over a completely public channel. No one intercepting the communication could deduce the key. It was a Copernican leap.
Rivest, Shamir and Adleman created the first practical public-key system, based on the fact that it is very easy to multiply two huge primes but very hard to factor the result. Public/private keys gave birth to digital signatures: you can prove you signed something without revealing your secret key. This is exactly what Bitcoin does when you send a transaction.
A hash function turns any input into a fixed-length "fingerprint". Bitcoin uses SHA-256. Its properties are critical:
8b1a9953c4611296a827abf8c47804d7... SHA-256 of "hola" (lowercase) → a completely different result. There is no known mathematical calculation to reverse the process.Bitcoin uses elliptic-curve cryptography (ECC), specifically the secp256k1 curve. A 256-bit ECC key is equivalent in security to a ~3,072-bit RSA key. Your Bitcoin private key is a random 256-bit number. Elliptic-curve operations derive your public key, and from it your address. The process is one-way at every stage.
In the early 1990s, a group of mathematicians and activists in San Francisco began meeting under the name "Cypherpunks". They believed digital privacy was the fundamental right of the information age. Eric Hughes wrote in 1993:
Philip Zimmermann created PGP (Pretty Good Privacy) — the first email encryption accessible to the general public. The U.S. government investigated him for 3 years for "exporting munitions". Satoshi Nakamoto published the Bitcoin whitepaper on the Cypherpunks’ cryptography mailing list in October 2008. Bitcoin is the culmination of decades of their work.
On October 31, 2008, a person or group under the pseudonym Satoshi Nakamoto published a 9-page document titled "Bitcoin: A Peer-to-Peer Electronic Cash System". In those 9 pages was the solution to a problem that had frustrated cryptographers for decades.
With physical money, if you have a €50 note you cannot give it to two people at once. Digital money has the opposite problem: a digital file can be copied infinitely. Satoshi’s solution: instead of a central arbiter (a bank), a network of thousands of computers that verify and record every transaction in a public, shared ledger — the blockchain.
A miner takes the contents of the next block and searches for a number (nonce) such that the SHA-256 hash of the full block starts with a given number of zeros. There is no clever way to find it — only brute force: billions of attempts per second. The first to find it broadcasts the block and wins the reward: currently 3.125 BTC + fees.
Every 2,016 blocks (~2 weeks), the protocol automatically adjusts the difficulty so the average time between blocks is always ~10 minutes. If more miners join, difficulty rises. If they leave, it falls.
A common misconception: many believe miners are the guardians of Bitcoin. They are not — the nodes are.
There are more than 15,000 active full nodes distributed around the world. There is no way to shut them all down. Miners work for the network — not the network for the miners.
Bitcoin has a 21-million issuance cap, hard-coded into the protocol. Every 210,000 blocks (~4 years), the block reward is halved:
| Event | Date | Reward | BTC issued |
|---|---|---|---|
| Genesis | 2009 | 50 BTC | 0 |
| 1st Halving | 2012 | 25 BTC | ~10.5M |
| 2nd Halving | 2016 | 12.5 BTC | ~15.75M |
| 3rd Halving | 2020 | 6.25 BTC | ~18.375M |
| 4th Halving | 2024 | 3.125 BTC | ~19.7M |
| Last block | ~2140 | ~0 BTC | 21M |
Bitcoin does not use accounts like a bank. It uses UTXOs (Unspent Transaction Outputs): each UTXO is like a physical banknote. When you spend it, you spend it whole and receive the "change" as a new UTXO.
Base Bitcoin processes ~7 transactions per second; Visa ~24,000. Lightning solves this with off-chain payment channels: you open a channel with an on-chain transaction, make instant and almost free payments inside the channel, and close it with another on-chain transaction. El Salvador uses it for everyday payments as legal tender.
Ethereum transitioned from PoW to PoS in September 2022 (The Merge). The Bitcoiner critique: "Without a real external cost, security is circular — it depends on the very coin the network issues."
| Mechanism | Description | Examples | Vulnerability |
|---|---|---|---|
| DPoS | Holders vote for delegates who validate | EOS, TRON | Delegate capture, centralisation |
| Proof of History | Cryptographic proof of time ordering | Solana | Complexity, validator outages |
| Proof of Space | Disk space as a computational resource | Chia | Speculative storage market |
| Proof of Authority | Known, verified validators | Private networks | Total centralisation, permissioned |
Mining solo is like buying a lottery ticket: a chance to win but enormous variance. Pools combine the hashrate of thousands of miners and split the rewards proportionally. The largest in 2024: Foundry USA (~30%), AntPool (~20%), F2Pool (~15%).
In the physical world, "owning" something means no one can take it from you without physical force. In the digital financial world, "owning" money means a bank has an entry in its database that it can change.
Bitcoin changes this radically. If you hold the private key to a Bitcoin address, mathematically only you can move those funds. Not a bank, not a government, not a tech company.
Central banks are developing their own digital currencies (CBDCs). On the surface they sound like "government crypto", but in their values they are the opposite of Bitcoin:
| Feature | Bitcoin | CBDC |
|---|---|---|
| Issuance | Limited, predictable, immutable | Discretionary, unlimited |
| Privacy | Pseudonymous | Total surveillance |
| Permission required | None | State-approved account |
| Programmability | No (by design) | Money with expiry, spending restrictions |
| Censorship resistance | Maximum | Maximum censorship capability |
| Holder control | Total (with self-custody) | Zero |
Bitcoin competes with gold as a store of value, but surpasses it in portability, divisibility, verifiability and resistance to confiscation. In 1933, Roosevelt forced Americans to hand over their gold. In 2022, the West froze $300bn in Russian gold reserves. Properly self-custodied Bitcoin cannot be confiscated.
The Human Rights Foundation systematically documents how Bitcoin serves as a human-rights tool: 1.4 billion adults without banking access, remittances that cost 6–7% with the traditional system and <0.1% with Lightning, and savings protection in countries with hyperinflation.
Satoshi designed a system where the honest strategy is the most lucrative. A miner has three options:
Holders know issuance will be halved → incentive to accumulate beforehand. Miners know their income will drop → the inefficient leave, the efficient thrive. Institutions know the halving has historically preceded rallies → a self-fulfilling prophecy.
Network effects: larger market cap, higher hashrate, greater recognition, deeper liquidity, more nodes. Each advantage reinforces the others. Bitcoin has the largest market cap, the highest hashrate, the greatest global recognition, the most nodes and the deepest liquidity — a virtuous circle that is practically impossible to displace as the benchmark digital store of value.
The first major Bitcoin exchange, with 70% of global volume. 850,000 BTC stolen (~$50bn at current prices). Lesson: centralised custody creates catastrophic single points of failure.
Sam Bankman-Fried (SBF) built FTX as the most reputable exchange in the sector. In November 2022, within 72 hours, it collapsed. FTX lent user funds to its sister firm Alameda Research for speculative bets. $8bn of client funds. SBF was sentenced to 25 years.
| Aspect | CEX (Coinbase, Binance) | DEX / DeFi (Uniswap, Aave) |
|---|---|---|
| Custody | The exchange (counterparty risk) | The user (smart contracts) |
| KYC | Mandatory | Not required |
| Speed | Instant (off-chain) | Depends on the blockchain |
| Fees | Fixed, competitive | Variable (gas), sometimes high |
| Main risk | Bankruptcy, hack, freezing | Contract bugs, protocol hacks |
On January 10, 2024, the U.S. SEC approved the first spot Bitcoin ETFs. In the first year, they accumulated more than $50bn — the most successful ETF launch in history. The main issuers: BlackRock (IBIT), Fidelity (FBTC), ARK Invest.
This fundamentally changes the dynamic: ETFs absorb bitcoins from the open market and lock them in institutional vehicles, reducing available supply exactly when institutional demand is growing.
| Cycle | Low price | High price | Max drawdown | Catalyst |
|---|---|---|---|---|
| 2011 | ~$1 | ~$31 | -93% | Mt. Gox, first speculators |
| 2013 | ~$13 | ~$1.163 | -85% | Silk Road, early adoption |
| 2017 | ~$750 | ~$20.000 | -84% | ICO boom, mainstream media |
| 2021 | ~$10.000 | ~$69.000 | -77% | Institutions, futures ETFs |
Observable pattern: each cycle reaches a higher all-time high. And each drop is smaller in percentage terms. The market is maturing.
Every four years, the halving cuts the creation of new bitcoins in half. Gold can discover new mines; fiat currencies can be printed without limit. Bitcoin is deflationary by design: creation falls inexorably and stops in 2140.
MicroStrategy (+200,000 BTC), Tesla, El Salvador, BlackRock and Fidelity ETFs, Wisconsin and Michigan pension funds in 2024. From a tech-enthusiast asset to an internationally recognised asset class.
The 2020–2023 period was the largest monetary-expansion experiment in modern history. Governments injected more than 10 trillion dollars. The result was the highest inflation in 40 years in the West — making Bitcoin a relevant asset for protecting savings.
Europe: MiCA (2024) provides a clear regulatory framework. U.S.: approval of spot ETFs, classification of Bitcoin as a commodity by the CFTC. Hong Kong, Singapore, Dubai: pro-crypto regulations attracting companies in the sector.
Each new user increases the value for everyone. The Bitcoin network grows with every wallet created, every active node, every exchange that lists it and every company that accepts it as payment.
Lightning Network for micropayments, Taproot for greater privacy and simple contracts, Ordinals for new use cases, RGB and other second-layer protocols expanding capabilities without compromising the base layer.
The BRICS are seeking alternatives to SWIFT. The freezing of $300bn in Russian reserves in 2022 showed every country that the dollar can be a weapon. Bitcoin is the only financial asset with no sovereign state behind it — neutral in geopolitical conflicts.
China (2021): banned all crypto activity. The hashrate fell 50% in weeks and recovered within months — miners migrated to the U.S., Kazakhstan, Russia. India: a 30% tax on gains. U.S.: the SEC aggressively pursued the sector under Gary Gensler (2021–2024).
Bitcoin consumes ~150–200 TWh per year. For comparison: the gold industry consumes ~131 TWh/year; global banking ~240 TWh/year; air conditioning in the U.S. ~600 TWh/year. More than 50% of Bitcoin’s energy is renewable.
The association of Bitcoin with illegal activity is another persistent FUD. The data show that less than 0.5% of Bitcoin transaction volume is tied to illicit activity — significantly less than dollar cash.
A sufficiently powerful quantum computer could break Bitcoin’s elliptic-curve cryptography. Today’s quantum computers have ~1,000 functional qubits; an estimated ~4 million would be needed to threaten Bitcoin. The community is already researching post-quantum algorithms. The same risk affects all of today’s digital infrastructure: online banking, military communications, government systems.
| Institution | Anti-Bitcoin statement | Later action |
|---|---|---|
| JPMorgan (Dimon) | "It’s a fraud" (2017) | Launches a Bitcoin ETF, crypto services (2024) |
| Goldman Sachs | "Not a viable asset class" (2018) | Crypto trading desk, Bitcoin futures (2022) |
| BlackRock (Fink) | "Money-laundering index" (2017) | Launches IBIT, the world’s largest Bitcoin ETF (2024) |
| Morgan Stanley | Banned crypto exposure for advisors | Allows recommending Bitcoin ETFs (2024) |
| ECB | Academic paper calling for a Bitcoin ban (2023) | Launches the digital euro while Bitcoin keeps growing |
The financial sector has reached a conclusion: they cannot destroy Bitcoin or the blockchain, but they can adopt it. BlackRock has a $500M tokenised fund on Ethereum. JPMorgan runs repos with tokenised bonds. The debate is no longer "blockchain or not" — it is "private blockchain (corporate) vs. public blockchain (Bitcoin/Ethereum)".
In 2024, Bitcoin has become a genuine macroeconomic asset: its price is influenced by the Fed’s monetary policy (high rates → capital flows to safe assets → Bitcoin falls), the U.S. dollar (a historically inverse correlation), and geopolitical risk.
The question of whether Bitcoin is a "risk asset" or a "store of value" has no simple answer — it depends on the time horizon and the type of crisis. In the short term it behaves like a risk asset; in the long term, it tends to appreciate against all fiat currencies.
El Salvador (2021): the first country to adopt Bitcoin as legal tender. Goals: cut remittance costs (26% of GDP), include the 70% without a bank account, attract investment. As of 2024: Bitcoin remittances are less than 5% of the total (citizens prefer dollars), but the country has accumulated +5,000 BTC as a sovereign reserve with significant gains.
The strategic reserve: In 2024–2025, the debate over whether the U.S. should create a "strategic Bitcoin reserve" became a serious political topic in the Senate. If the U.S. adopted an accumulation policy, it would trigger a race between countries comparable to the gold reserves of the 20th century.
| Scenario | Description | Estimated price |
|---|---|---|
| Bitcoin Standard | Global store of value. Countries use it as collateral. | $1.000.000+ |
| Digital gold | Coexists with fiat as a store of value for 5–10% of world savings. | $200K–500K |
| Alternative asset | One more asset in diversified portfolios. 1–2% of global assets. | $50K–200K |
| Regulated stagnation | Excessive regulation limits growth. It survives but does not scale. | Stagnant price |
| Technological collapse | Quantum computing, a catastrophic bug or technological replacement. | <$1K |