Bitcoin is a decentralized digital currency that uses blockchain technology for peer-to-peer transactions without a central authority. It was introduced in 2008 by an anonymous developer or group known as Satoshi Nakamoto. The first Bitcoin block, known as Block 0 or the genesis block, was mined on January 3, 2009.

Key facts:

• Bitcoin mining involves solving cryptographic puzzles to add blocks to the blockchain and earn bitcoins as rewards.
• Bitcoin’s reward for mining a block was initially set at 50 bitcoins in 2009 but halves approximately every four years. As of April 2024, the reward is 3.125 bitcoins per block.
• Bitcoin can be purchased through cryptocurrency exchanges using fiat currency.
• Bitcoin is not insured by the Securities Investor Protection Corporation (SIPC) or the Federal Deposit Insurance Corporation (FDIC).
• Bitcoin’s price movements are highly volatile; it reached an all-time high of over $124,000 in August 2025.

Despite its popularity, Bitcoin faces several challenges. Even with the security measures inherent within a blockchain, there are still opportunities for fraudulent activity. Bitcoin is accepted as payment by many merchants and retailers, but its use varies widely.

The cryptocurrency market remains dynamic. As of April 2026, authorities do not classify Bitcoin as a security, but this could change in the future. Investors must navigate these uncertainties and assess their investment risks carefully.

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