22 – Blockchain: The Technology Behind Cryptocurrencies

Blockchain

Contents

Lesson 22 – The Best Free Finance Course in History

In this lesson, we'll discuss how blockchain technology enables cryptocurrencies, their future prospects, and their advantages and disadvantages.

Course index:

  1. Basic Concepts of Money and Personal Finance
    Introduction to the value of money, the importance of saving, and spending control.
  2. Budgeting and Financial Planning
    Create a personal budget, manage income and expenses, and set financial goals.
  3. Inflation and Purchasing Power
    Explanation of how inflation affects the value of money over time.
  4. Interest Rates and Time in Finance
    Differences between simple and compound interest rates and their importance in investments.
  5. How to defend your savings
    How to protect your money from the scams that abound today.
  6. Basic Savings Instruments
    Explanation of savings accounts, term deposits, and how they work.
  7. Introduction to the Stock Market
    Basic concepts of the stock market and its role in the global economy.
  8. Actions: What They Are and How They Work
    Explanation of stocks, types (common and preferred), and how to invest in them.
  9. Bonds: What They Are and How They Work
    Differences between corporate and government bonds, and their importance in diversification.
  10. Risk vs. Return on Investments
    Concept of risk and how it affects investment choices.
  11. Diversification and Creating a Simple Investment Portfolio
    Basic diversification principles to reduce risk in an investment portfolio.
  12. What is an ETF and How Does it Work?
    Introduction to ETFs (exchange-traded funds) and how they track market indices.
  13. Introduction to Mutual Funds
    An explanation of mutual funds and their benefits for beginners.
  14. Financial education for the family.
    Explanation of the economic principles that can help your family make ends meet.
  15. Economic Cycle and its Impact on Investments
    How the stages of expansion and contraction in the economy affect investments.
  16. Growth Stocks vs. Value Stocks
    Differences between these types of actions and when each is appropriate.
  17. Fundamental Analysis of Stocks
    Explanation of how to analyze a company's value based on its fundamentals.
  18. Basic Technical Analysis: Charts and Patterns
    Introduction to basic technical analysis tools, such as trend lines and candlestick patterns.
  19. Options: What They Are and How They Work
    Basic concepts of call and put options and their uses in investments.
  20. Futures: What They Are and How They Work
    Introduction to futures contracts and their application in investment and speculation.
  21. Introduction to Cryptocurrencies
    What is digital money, how it was created, and the characteristics of Bitcoin and other cryptocurrencies.
  22. Blockchain and its Importance in Finance
    How the technology behind cryptocurrencies works and their applications in finance.
  23. Risks in Cryptocurrency Trading
    Volatility, fraud, and regulations in the cryptocurrency market.
  24. Leverage Principles and its Risk
    What it means to trade with leverage and the associated risks.
  25. Investor Psychology and Emotion Management
    How emotions influence investment decisions and tips for managing them.
  26. What is Algorithmic Trading
    Basic explanation of the use of algorithms to perform operations in the financial market.
  27. Financial Analysis of Companies
    Introduction to basic financial statements and their interpretation for valuing companies.
  28. Investing in Commodities: Gold, Oil, and Other Goods
    How commodity investments work and their role in diversification.
  29. Advanced Investment Strategies: Hedging and Derivatives
    Introduction to strategies for managing risks through financial derivatives.
  30. Creating and Managing a Complete Portfolio
    Practical application of prior knowledge to build and manage a diversified portfolio.
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Blockchain is a word that sounds a bit complicated, but don't worry, I'll explain it to you easily. It's like a giant notebook where everything that happens with cryptocurrencies is written down., but it's not on paper, it's on the internet. Imagine a record that no one can erase or change, and that anyone can see if they want. That's blockchain, and it's the magic behind things like Bitcoin or Ethereum.

It's not just for crypto, eh. Blockchain is a technology that serves a lot of purposes., from saving important data to creating automatic contracts. But don't worry, we'll go step by step so you understand it clearly, as if I were telling you while sipping mate in the kitchen.

What does blockchain mean?

First, let's break down the word. "Block" is a block, and "chain" is a chain. So, blockchain is a chain of blocksEach block is like a page in that notebook I told you about, and it stores information about what's happening: who sent money, how much, to whom, and when. When a block is full, it closes and connects to the next, forming an unbroken chain.

The cool thing is that there is no single person or company managing itThousands of computers around the world have a copy of that notebook, and they all check to make sure what's written is true. If someone tries to pass off the cat as a rabbit, the others stop them. It's like a giant team keeping order.

How did blockchain begin?

Blockchain was born with Bitcoin in 2009. A guy (or group, because nobody knows who he really is) who called himself Satoshi Nakamoto invented it. I wanted cryptocurrencies to be secure and not dependent on banks or governments.. So he came up with this idea of blockchain as a way to record everything without anyone being able to cheat.

Before that, there was nothing like it. The blockchain was like a revolutionary invention, because it changed how we store and share things on the internet. Since 2009, it's grown significantly, and today it's used for more than just cryptocurrencies.

How does blockchain work?

Let's get down to business: how does it work? It's like a digital trust systemWhen someone does something with cryptocurrency, like sending Bitcoin to a friend, that transaction is written into a block. But it doesn't write itself. There are special computers, called "nodes," that review everything.

These computers check that the transaction is real: that you have the money you say you have and that you are not spending it twice. If everything is OK, the block is closed and added to the chain.Once it's there, there's no going back, it's etched in your memory forever.

Blockchain
Blockchain, the notebook that never gets erased

Why is it so safe?

Here's what makes blockchain special: It is almost impossible to hack or change itWhy? Because it's on thousands of computers at once. If someone wants to hack in and modify a block, they'd have to change every copy in the world at the same time, and that's crazy.

Also, it uses something called cryptography. They are very complicated codes that protect the information., like a digital lock that only opens with the correct code. In Argentina, where we're always wary of being robbed, this is a perfect fit.

Who controls the blockchain?

Nobody and everyone at the same time. There is no boss or company behind the blockchainThat makes it different from, say, a bank, where there's a manager who decides everything. Here, the rules are set by the system itself, and the computers that keep it running are run by ordinary people, companies, or groups around the world.

In Argentina, this is liked because gives us freedomYou don't depend on a government that puts obstacles in your way or a bank that charges you absurd fees. It's like managing your own money without anyone looking down on you.

What happens inside a block?

Each block has three main things. First, the operations info, such as "John sent 0.1 Bitcoin to Mary." Second, a special code called a "hash," which is like a unique fingerprint of the block. And third, the hash of the previous block, which connects it to the chain.

If someone touches something in a block, the hash changes and other computers notice. It's like a perfect anti-cheat systemThat's why blockchain is so reliable.

Blockchain and cryptocurrencies

Blockchain is the heart of cryptocurrencies. Without blockchain, Bitcoin would not existIt's what allows you to send money to someone without a bank in the middle. For example, if you send crypto to your cousin in Mendoza, the blockchain records everything and ensures it arrives.

In Argentina, where the dollar is in trouble and the peso is losing value, Blockchain gives us a way to move money quickly and safely.That's why cryptocurrencies have become so popular here.

What else is blockchain used for?

Not everything is cryptocurrencies. Blockchain is used for a lot of cool thingsFor example, in the Argentine countryside, some companies use it to track products. Imagine knowing which cow the steak you're eating came from, all recorded in the chain.

It also works for smart contracts. They are agreements that are fulfilled by themselves, without the need for lawyers or paperwork. For example, "I'll pay you 1,000 pesos if you send me the order by Friday." The blockchain verifies compliance and makes the payment automatic.

Blockchain in Argentina

Here in Argentina, blockchain is growing slowly but surely. There are startups in Buenos Aires, Córdoba and Rosario that use it to innovate.For example, in the agricultural sector, some use it to sell soybeans or corn directly abroad, without intermediaries taking a cut of the business.

Universities like the UBA and the UNC are also involved. They study how to use blockchain to improve the country, from making elections more transparent to saving health data. It's a promising topic for the future.

Advantages of blockchain

Why is blockchain so popular? It is transparent like waterEveryone can see what's happening on the network (though not always who, for privacy reasons). That builds trust, something we always need in Argentina.

Another advantage is that remove the middlemenIf you want to send money or make a deal, you don't need a bank, a notary, or anything like that. Everything is direct, fast, and cheaper.

Disadvantages of blockchain

Not everything is rosy, of course. Blockchain uses a lot of energy, because all those computers running consume electricity like crazy. In a country like Argentina, where electricity isn't always cheap, that can be a problem.

It can also be slow if there are many operations together. It's not as fast as Mercado Pago to pay for groceries., for example. And to use it well, you have to understand it a little, which isn't easy for everyone.

How is blockchain maintained?

Blockchain doesn't work alone; it needs people to make it work. There are people and companies that use their computers to verify transactions.This is called “mining.” Miners, as they are known, earn cryptocurrencies in exchange for their work.

In Argentina, there are also miners, although not as many as elsewhere. You need a powerful computer and cheap energy to make it worthwhile.With power outages and the cost of electricity, it's not as common, but some people make do.

Blockchain and security

Security is the first thing people think of when they hear blockchain. It's super secure because everything is encrypted and distributed across thousands of locations.If one of your computers is hacked, the rest of your computer will still work, and you won't lose anything.

Yes indeed, Safety depends on you tooIf you lose the key to your blockchain-based crypto wallet, no one can get it back. It's like losing your house key: you're locked out.

Let's imagine you want to send 100 pesos in Bitcoin to your brother. You make the transaction in your digital wallet, and that goes to the blockchain. Computers check it, write it into a block, and voila, your brother has the money. All in minutes, without banks or lines.

In Argentina, this is a great goal. Sending money to the interior or abroad without paying a fortune is something that many people need.. Blockchain makes it possible.

The future of blockchain

What comes next? Blockchain could change a lot of things.Some say that in the future we'll be using it for everything: voting online, buying houses, storing university degrees. In Argentina, it could help make things more transparent, which would be a great thing for us.

For now, it is growing slowly. It is necessary that more people understand it and that the cost of using it goes down.But the potential is there. It's like the internet in the 90s: few people used it at first, and look how it exploded later.

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Blockchain in everyday life

Today, blockchain is already in things you use without realizing it. If you buy crypto, you are using blockchainBut it can also be in logistics apps, in banks that try new things, or in online games.

In Argentina, some kids are already using it for business ventures. There are startups that help you sell products with blockchain., ensuring everything is legal and clear. It's a tool that, if you get the hang of it, can give you an advantage.

Tips for understanding blockchain

If you want to get more into this world, Start by reading simple things like this lesson You don't have to be an engineer. Watch videos, search on Google, or chat with someone who knows. In Argentina, there are some really cool online communities where they'll explain everything.

Try it with crypto to see it in action.Buy a little Bitcoin or Ethereum and follow its movements on the blockchain. It's the best way to learn by playing.

Is blockchain worth it?

To close, I tell you: Blockchain is a great technology that is here to stay.In Argentina, with our history of economic disasters, it can be a key tool. It's not perfect, but if we use it well, it can help us a lot.

What do you think? It's like a digital superpower, but you have to learn how to handle it. If you're interested, feel free to explore it further; it's a super interesting world!

Next course date

September 25, 2025. You will be able to access it with this link.

Questions for you to reflect on

What potential do you see in Blockchain technology?

Do you see a future for smart contracts?

What could happen in the event of a massive power outage?

A brief overview of The Pocket Investor

The Pocket Investor is a project that combines experience and passion for financial education to help you transform your relationship with money. Through personalized mentoringWe help you design investment strategies tailored to your goals and needs, optimizing your portfolio to address challenges like inflation and the dollar.

The books on finance and investment, including the popular The Argentine Pocket Investor - El Inversor de Bolsillo argentino, are practical tools that explain complex concepts in a simple way, bringing the world of investments closer to anyone interested in financial growth.

In addition, in the course The Pocket InvestorWe combine all this knowledge to offer you a complete experience: theory, practice, and strategies that truly work in the Argentine and global context. All this with a clear, friendly, and accessible approach, so you can achieve financial independence.

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