What are cryptocurrencies and how do they work?

Crypto

2.10.2025 8:30 AM

What are they and how do they work?

In recent years, the cryptocurrency phenomenon has come to occupy an important place in the global financial landscape. Many people are beginning to be interested in this new type of asset, either because they are looking for promising investment opportunities or simply because they want to understand more deeply this phenomenon that seems to be constantly growing.

Therefore, it is essential to become familiar with the concept of cryptocurrencies, as well as to understand how they operate and what their main characteristics are. In this article, we will provide you with a clear and detailed explanation that will allow you to better orient yourself in the vast and often complex world of cryptocurrencies, thus facilitating your learning and understanding of this topic that is increasingly relevant today.

What are cryptocurrencies?

Cryptocurrencies are a type of currency that exists in digital format and that uses a fairly advanced technology called cryptography. This use of cryptography aims to secure the transactions that are made with these currencies, as well as to verify that these transactions are carried out correctly. In addition, cryptography is also used to control the process by which new units of these digital currencies are created. Unlike traditional currencies, which are issued and regulated by a central authority, such as a central bank or government, cryptocurrencies operate independently of these entities. Its operation is based on a technology known as blockchain, which can be described as a distributed registry. This record is essential because it documents every transaction that takes place, ensuring that the information is accessible and transparent to all participants in the network, which in turn provides a high level of security.

A Brief History of Cryptocurrencies

The fascinating concept of cryptocurrencies began in 2009, at which time it took place the creation of Bitcoin.

This new digital currency was created by someone, or possibly a group of people, who used the pseudonym Satoshi Nakamoto to hide their true identity.

  • The new system aims to offer a decentralized payment method.
  • It will not be under the control of any government or central entity.
  • It allows users to carry out transactions more freely and privately.

Over the years, interest in cryptocurrencies has been increasing significantly. A technological experiment that began small has evolved into a viable and attractive financial option for a growing number of people globally.

This transformation has led many people to explore the possibilities offered by cryptocurrencies as an alternative to traditional financial methods.

Since the launch of Bitcoin, the first cryptocurrency, thousands of digital currencies have been created. Each one has different characteristics and applications. This breakthrough has helped to form a diverse financial ecosystem that continues to grow as new technologies and ideas emerge in the field of digital finance.

The remarkable growth in popularity of cryptocurrencies, together with a growing demand for innovative financial solutions, has positioned these digital currencies as a valid option in the modern financial landscape.

Increasingly, institutions and individuals consider cryptocurrencies as an important component of their investment and financial planning strategies.

How do cryptocurrencies work?

The operation of cryptocurrencies is based on three key components: blockchain, cryptography and mining.

  1. Blockchain: It is a distributed database that stores the information of all the transactions made with a particular cryptocurrency. Each block contains several transactions and is linked to the previous block, forming a chain (hence the name “blockchain”).
  2. Cryptography: It is used to secure transactions and control the creation of new cryptocurrency units. Cryptography ensures that only authorized individuals can access funds and carry out transactions.
  3. Mining: It is the process by which transactions on the blockchain are validated and confirmed. Miners use powerful computers to solve complex mathematical problems, and as a reward, they receive new cryptocurrencies.

Essential characteristics of a cryptocurrency

  1. Digital: Unlike traditional money, which we can touch and feel, cryptocurrencies don't have a physical form. They can be operated, transferred and used only through electronic devices, such as computers and mobile phones.

Decentralized: Cryptocurrencies are not managed or controlled by entities such as central banks or governments. On the other hand, transactions made on this network are verified by a community of users using blockchain technology. This technology ensures that all transactions are recorded clearly and securely.

  1. Secure: These currencies use advanced cryptography to ensure the integrity and security of each transaction. This means that the possibilities of fraud or manipulation are considerably reduced, which generates trust among users.

A clear example of cryptocurrency is Bitcoin. This was the first of its kind and is designed to be an alternative payment system. It works without intermediaries such as banks or governments. This gives users more control over their money and transactions.

Cryptocurrency investment

Investing in cryptocurrency can be a lucrative opportunity, but it also comes with risks. Cryptocurrencies are known for their volatility, meaning that their prices can fluctuate significantly over short periods of time.

Advantages of investing in cryptocurrency

  1. High returns: Cryptocurrencies have proven to be a very profitable investment, with many investors making large profits in a relatively short time.
  2. Diversification: Investing in cryptocurrency allows you to diversify your portfolio, reducing the risk associated with having all your investments in a single type of asset.
  3. Accessibility: You can buy and sell cryptocurrency at any time of the day, as cryptocurrency markets are open 24 hours a day.

Risks of investing in cryptocurrency

  1. Volatility: As we mentioned, cryptocurrencies can experience drastic changes in their value, which can result in significant losses.
  2. Security: Although cryptocurrency transactions are secure, exchanges and wallets can be vulnerable to cyberattacks.
  3. Regulations: Cryptocurrencies are not yet fully regulated, which can lead to legal uncertainties and changes in government policies that affect their value.

Blockchain: The Heart of Cryptocurrencies

In order to fully understand how cryptocurrencies work, it is essential to have a clear understanding of the concept of blockchain. This technology, which may seem complex at first, is, in essence, a distributed database whose main function is to accurately and securely record all the transactions carried out with cryptocurrencies in the digital ecosystem. The blockchain acts as a public accounting book that allows transparency and trust in transactions carried out in the field of digital currencies.

How does blockchain work?

  1. Each time a transaction is made, it is documented in a specific block. This block contains crucial information, including details such as who is the issuer of the transaction, who is the receiver, and how many cryptocurrencies are being transferred.
  2. The blocks generated are not isolated, but are interconnected to each other, forming a structure called “blockchain”. This platform stores all transactions so that they are easy to audit and access, thus ensuring a high level of transparency and security for all the users involved.
  3. The network composed of multiple users is responsible for validating transactions through complex mathematical algorithms. This validation process eliminates the need for intermediaries, such as banks or financial institutions. This makes the system more efficient and direct for carrying out transactions.

The blockchain plays a crucial role not only in securing the transactions that take place, but also in acting as a barrier that prevents the duplication or falsification of digital currencies, which is essential for maintaining confidence in the validity of cryptocurrencies.

Popular cryptocurrency types

Currently, there is an incredible variety of more than 10,000 different cryptocurrencies on the market. However, within this vast universe, there are some that stand out notably for their popularity and general acceptance. Here are the most relevant cryptocurrencies in the current scenario:

1. Bitcoin (BTC)

  • Bitcoin is recognized as the first cryptocurrency that was created, marking the beginning of a new era in the financial field.
  • This digital currency has a limited supply, with a maximum of 21 million units that can be generated, giving it a scarce value.
  • The current value is around 103,319.20 USD per Bitcoin, which highlights its popularity as an investment.

2. Ethereum (ETH)

  • Ethereum has become one of the main cryptocurrencies, particularly because of its ability to allow the creation and execution of smart contracts.
  • At present, there are more than 115 million units of Ethereum in circulation, further consolidating its use and popularity in the cryptocurrency ecosystem.
  • The current price of Ethereum is around 3,290.58 USD per unit, demonstrating its relevance in the markets.

3. Tethermain (USDT)

  • Tether is a stable currency that is designed to keep its value aligned with traditional assets such as the U.S. dollar and the euro. This makes it a reliable option for those looking for stability in a volatile market.
  • The price of Tether remains relatively stable, at approximately $1 per unit. This makes it a popular choice for traders looking for stability in times of uncertainty.

Buying and selling cryptocurrency

Buying and selling cryptocurrency is easier than you might think. To get started, you'll need to follow a few basic steps:

Step 1: Choose an exchange platform

There are numerous exchange platforms where you can buy and sell cryptocurrency. Some of the most popular ones include Hapi, Coinbase, Binance and Kraken. Make sure you choose a platform that is safe and reliable.

Step 2: Create an Account

Once you've chosen a platform, you'll need to create an account by providing your personal information and verifying your identity. This process is similar to opening a bank account.

Step 3: Buy cryptocurrency

After setting up your account, you'll be able to deposit funds and start buying cryptocurrency. Most platforms allow you to buy fractions of cryptocurrency, so you don't need a large sum of money to get started.

Step 4: Store your cryptocurrency

It's important to store your cryptocurrency securely. You can choose to leave them on the exchange platform or transfer them to a digital wallet. Digital wallets can be online (hot wallets) or offline (cold wallets), and each has its advantages and disadvantages in terms of security and accessibility.

Step 5: Sell your cryptocurrency

When you decide to sell your cryptocurrencies, you can easily do so through the same exchange platform. Simply select the quantity you want to sell and confirm the transaction. The funds will be deposited in your account, and you can withdraw them to your bank account.

Conclusion

Cryptocurrencies are significantly transforming the financial sector as we know it. Thanks to their digital nature, they allow users to carry out transactions worldwide quickly and efficiently, in addition to providing a high level of security.

This security measure is considerably more advanced than traditional methods in the financial sector, making it an attractive option for many individuals and companies around the world.

It's important to understand that there are risks involved in using and investing in cryptocurrency, especially for those who are new to this type of investment. These risks can be varied and range from market volatility to security issues on exchange platforms.