Bitcoin for Beginners: What It Is and How to Invest Safely

Bitcoin is a digital currency created in 2009 that operates without a central bank or controlling company. Transactions are recorded on a public network called a blockchain, maintained by thousands of computers. Before buying, it is worth understanding what gives the asset value, what the risks are, and how to store it safely.

What makes bitcoin different

Supply is capped at 21 million units, defined in the code. Approximately every four years, the halving occurs—an event that cuts the issuance of new bitcoins in half; the most recent one took place in April 2024. This programmed scarcity is the primary argument for those who view bitcoin as a store of value. Critics point out that the asset generates neither profits nor cash flow, and that its price depends essentially on demand.

Volatility is the rule

Bitcoin has already experienced drops of more than 70% from all-time highs across multiple cycles. Anyone buying must be prepared to see the value of their position cut in half without panic selling. Because of this, many financial educators suggest limiting exposure to a small portion of your net worth—one that can fluctuate without jeopardizing important goals.

Ways to gain exposure

Crypto exchanges allow you to buy fractions of bitcoin starting from just a few reais. ETFs traded on B3 (the Brazilian stock exchange) provide price exposure without the need to manage private keys, subject to variable-income (equity) taxation. There are also investment funds with an allocation to cryptoassets. Each route involves different costs, tax rules, and operational risks.

Custody: who holds the keys

Leaving your bitcoin on an exchange is simpler, but it means trusting the company's solvency and security. There have already been international exchange bankruptcies where customers lost access to their funds. Self-custody in personal wallets, especially hardware wallets, reduces this risk, but transfers all responsibility to you: anyone who loses their recovery phrase loses access, with no customer support available to recover it.

Most common scams

Promises of fixed yields in cryptocurrencies, arbitrage bots with guaranteed profits, fake celebrity profiles, and requests to send bitcoin and receive double back are recurring scams. Never share your recovery phrase, and be suspicious of anyone offering unsolicited help to recover funds.

Taxes

In Brazil, gains on cryptoassets are subject to income tax, and positions must be declared. The rules vary depending on the transaction's venue and the total sales volume. The article on cryptocurrency taxes details these obligations; always check the current guidelines on the Receita Federal (Federal Revenue Service) website.

Checklist before buying

Do I have an emergency reserve and no high-interest debt? Have I defined what percentage of my net worth I am willing to expose? Do I understand that I could lose a large portion of its value? Do I know where and how I will store it? Do I know how to report it for taxes? If any answer is no, it is still too early to buy.