In recent years, crypto assets and blockchain technology have emerged as disruptive innovations in the global financial landscape. As a result, these technologies have not only introduced new forms of transactions and investments, but have also challenged traditional legal structures. Therefore, legal professionals need to continually adapt and develop new skills.
In this article you will find an overview of crypto assets and blockchain technology, exploring their potential legal impacts and the essential skills that lawyers must acquire to work effectively in this constantly evolving field.
What are crypto assets and cryptocurrencies?
In general, crypto-assets, known in the Brazilian regulatory context as "virtual assets," can be defined as "digital representations of values or rights that can be transferred and stored electronically." Within this category, there are several types of crypto-assets, used for various functions, such as cryptocurrencies, tokens, and NFTs (Non-fungible Tokens).
Crypto Signals Room
On the other hand, cryptocurrencies can be defined as decentralized digital "money." This means that, unlike traditional currencies issued by central authorities such as central banks or governments, cryptocurrencies operate in decentralized systems based on blockchain technology.
Cryptocurrencies possess several unique characteristics that differentiate them from other financial assets. Among these characteristics, the following stand out:
- DecentralizationThere is no central authority controlling the currency; transactions are verified by a distributed network of computers.
- TransparencyAll transactions are recorded in a public "ledger," the blockchain, accessible to anyone.
- SafetyAdvanced encryption can provide a layer of protection for transactions and digital wallets against fraud and cyberattacks, which doesn't mean these won't happen.
- Pseudonymity: Although many believe that cryptocurrency transactions are completely anonymous, in practice, blockchain transactions are public and the addresses involved can be traced.
Bitcoin
Bitcoin, launched in 2008 by Satoshi Nakamoto, is the best-known and, consequently, the most popular cryptocurrency. However, a diversity of cryptocurrencies are already available on the market for different usage profiles. Furthermore, several governments around the world, such as the United States government, have announced measures to create strategic reserves in cryptocurrencies.
Among the best known we can mention:
- Bitcoin (BTC)Created in 2008, it is the first and best-known cryptocurrency, often referred to as "digital gold" due to its market value and global acceptance.
- Ethereum (ETH)Introduced in 2015, in addition to functioning as a digital currency, it also allows the creation and execution of smart contracts and decentralized applications.
- Left (LEFT)Launched in 2020 on the blockchain of the same name, its protocol was developed to offer greater scalability and facilitate the creation of decentralized applications.
What is Blockchain Technology?
Blockchain, as the name suggests, is a chain of blocks that functions as a distributed and immutable digital "ledger" that records all transactions in a transparent and secure manner.
Basically, a blockchain is composed of interconnected blocks, each containing a unique identifier called a hash. Therefore, any alteration to one block would require changes to all subsequent blocks, making the system extremely secure and resistant to fraud.
In the case of cryptocurrency transactions, each block in the chain contains a set of transactions with information such as values, addresses, and wallets associated with the transaction. Once recorded, this block cannot be altered without network consensus. This structure ensures the integrity and reliability of the data, eliminating the need for intermediaries.
In short, the creation of blocks in a blockchain works as follows:
- TransactionA transaction is initiated by a user and transmitted to the network.
- VerificationThe computer network (nodes) verifies the validity of the transaction using consensus algorithms, such as Proof of Work or Proof of Stake.
- Grouping into BlocksVerified transactions are grouped into a block.
- Chain AdditionThe block is added to the existing chain of blocks, forming a chronological and immutable sequence.
As a result, the main characteristics of a blockchain are:
- ImmutabilityOnce added, the information cannot be changed or deleted, ensuring data integrity.
- TransparencyAll participants have access to the same information, promoting trust and verifiability.
- SafetyThe decentralized structure and cryptographic mechanisms make attacks and fraud more difficult.
Legal Impacts of Cryptocurrencies and Blockchain Technology
The rise of cryptocurrencies and blockchain technology presents a number of challenges and opportunities for the legal field. Below, we explore some of the main impacts in these areas.
Regulatory Challenges
The innovative and decentralized nature of cryptocurrencies and blockchain technology challenges traditional legal systems, which generally rely on centralized entities for regulation and oversight. Therefore, issues such as the legal definition of cryptocurrencies, their classification as financial assets, and the application of existing laws are the subject of intense legal debate, and have even been the subject of recent public consultations by the Central Bank and the Federal Revenue Service.
Among the main challenges under discussion, we can list, but not exhaustively:
- Legal ClassificationTo determine whether cryptocurrencies should be treated as currencies, commodities, securities, or a new asset class.
- TaxationEstablish clear guidelines on how cryptocurrency transactions should be taxed, including capital gains and sales taxes.
- ConformityTo ensure that trading platforms and other intermediaries comply with anti-money laundering (AML) and know-your-customer (KYC) laws.
In Brazil, the absence of more specific regulations, beyond Law No. 14.478 (known as the Legal Framework for Cryptocurrencies), has led to varied interpretations and the need to adapt existing norms to encompass these new technologies. For example, the Federal Revenue Service requires taxpayers to declare their transactions with crypto assets, but there are still gaps and ambiguities that need to be addressed by legislation.
Smart Contracts
One of the main use cases for blockchain technology is the possibility of creating smart contracts , which are self-executing programs with the terms of the agreement directly written in code. These contracts are automatically executed when predefined conditions are met, eliminating the need for intermediaries and increasing efficiency.
Among the possible implications of smart contracts, it is worth mentioning:
- Legal ValidityTo determine whether smart contracts meet the traditional legal requirements for contract formation, such as offer, acceptance, and consideration.
- JurisdictionTo establish which jurisdiction applies to contracts that operate on a decentralized global network.
- Execution and ResourcesTo define mechanisms for resolving disputes and applying legal remedies when a smart contract does not function as expected.
Financial Crimes and Compliance
The pseudo-anonymity provided by cryptocurrencies gives the impression that it may facilitate illicit activities such as money laundering and tax evasion. This requires legal professionals to develop compliance strategies and Know Your Customer (KYC) policies to mitigate risks and ensure compliance with existing laws.
Skills needed for Legal Professionals
The cryptocurrency market is booming and is already a reality, offering numerous opportunities for professionals in various fields, including legal professionals. To operate effectively in this new scenario, interested legal professionals should pay attention to the following competencies:
- Technical knowledgeUnderstanding the fundamentals of blockchain technology and how cryptocurrencies work.
- Regulatory UpdateStay informed about changes in national and international legislation related to crypto assets.
- Compliance KnowledgeOne career path for interested professionals is to work in the area of compliance, developing and implementing compliance mechanisms that meet new legal requirements.
- AdaptabilityBeing prepared to deal with rapid technological evolution and its legal implications.
Final Words
Cryptocurrencies and blockchain technology are transforming the legal world, introducing new challenges and opportunities. Therefore, the field has opportunities and needs qualified legal professionals to handle and act in the face of rapid technological changes and ongoing regulatory discussions, not only in Brazil but throughout the world.
Therefore, legal professionals and others seeking to excel in this field should invest in continuing education and the development of specific skills to successfully navigate this constantly changing environment.
References:
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CNN Brazil. Central Bank launches public consultation on the regulation of virtual assets. Available at: https://www.cnnbrasil.com.br/economia/macroeconomia/banco-central-lanca-consulta-publica-sobre-regulamentacao-de-ativos-virtuais/. Accessed on: March 11, 2025.
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REUTERS. Trump signs order to establish strategic bitcoin reserve. Available at: https://www.reuters.com/technology/trump-signs-order-establish-strategic-bitcoin-reserve-white-house-crypto-czar-2025-03-07/. Accessed on: March 11, 2025.
Brazilian Federal Revenue Service clarifies declaration of cryptocurrency transactions. Available at: https://www.gov.br/receitafederal/pt-br/assuntos/noticias/2023/marco/receita-federal-esclarece-sobre-declaracao-de-operacoes-com-criptoativos. Accessed on: March 11, 2025.
Portuguese Catholic University. After all, cryptocurrencies are really here to stay. Available at: https://www.clsbe.lisboa.ucp.pt/noticias/afinal-criptomoedas-vieram-mesmo-para-ficar. Accessed on: March 11, 2025.
