Cryptocurrency

Cryptocurrency

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Master blockchain fundamentals, DeFi, and digital asset trading.

What Is Blockchain and How Does It Work?

When you pay a friend through your bank, the bank's records decide who paid whom, which raises an obvious question about bitcoin: with no bank involved, who keeps score? The answer is a blockchain, and the technology has moved well past crypto: the Depository Trust & Clearing Corporation, or DTCC, which safeguards more than $114 trillion in securities, ran its first live trades of blockchain-based stocks and Treasurys in July 2026 and plans to launch the service more broadly in October 2026. That makes blockchain worth understanding even if you never plan to buy a single coin.

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What Is Crypto Mining?

In late September 2026, JPMorgan analysts estimated that it costs miners about $85,000, on average, to produce a single bitcoin, almost exactly what one coin was selling for at the time. That price tag covers the electricity, specialized machines, and warehouse space behind crypto mining, the global competition that produces every new bitcoin. Knowing how that competition works explains why bitcoin's supply is capped, why it uses so much power, and why mining at home rarely pays.

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What Does Staking Crypto Mean?

In March 2026, BlackRock, the world's largest asset manager, launched a fund that holds Ether, the coin that powers the Ethereum network, and earns income by staking part of it. A Benzinga report on the fund's filing showed that the fund's sponsor and trading partner would keep a combined 18% of the staking rewards, which is why the advertised rate is rarely the rate you keep. Staking is now offered inside funds and crypto apps, so anyone who holds crypto will eventually be asked whether to switch it on.

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How to Pay Using Cryptocurrency

In May 2010, a programmer paid 10,000 Bitcoin, an early digital currency not run by any bank or government, for two pizzas. Those coins would be worth many millions of dollars today, which is why the order is remembered as the first major real-world purchase made with Bitcoin and a warning about what spending crypto can cost you. Paying with crypto has become far simpler since then, but the steps, the fees, and one tax rule still catch beginners off guard.

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Can You Short Sell Cryptocurrency?

When Bitcoin rebounded from the $60,000 range into the $80,000s in recent weeks, traders who had bet on a further drop were hit with historic short liquidations, meaning their exchanges automatically closed losing bets on their behalf. That episode is a live lesson in what it takes to bet against crypto, which everyday traders can do but which carries risks that ordinary buying does not. Knowing how those bets work, and how they fail, is the best way to judge whether they belong anywhere near your own money.

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