🔑 Bitcoin & Crypto Glossary

Address — A unique identifier (string of alphanumeric characters) used to receive Bitcoin. Like an email address for money.

Altcoin — Any cryptocurrency other than Bitcoin. Most altcoins are speculative assets with weak fundamentals compared to BTC/ETH.

ASIC — Application-Specific Integrated Circuit. Specialized hardware designed specifically for Bitcoin mining.

Bear Market — Extended period of declining prices, typically 50-80% drawdowns in crypto. Historically the best time to accumulate.

Bitcoin (BTC) — The original cryptocurrency. 21 million hard supply cap. Created by Satoshi Nakamoto in 2009. The HODLer's primary asset.

Blockchain — A distributed ledger of all Bitcoin transactions, maintained by thousands of nodes worldwide. Immutable, transparent, decentralized.

Block Reward — The Bitcoin awarded to miners for validating a block of transactions. Currently 3.125 BTC (post-2024 halving).

Bull Market — Extended period of rising prices. Post-halving cycles historically produce Bitcoin's most significant bull markets.

Cold Wallet — A hardware device that stores private keys offline, away from internet threats. Essential for securing significant holdings.

Custodial — When a third party (exchange, bank) holds your cryptocurrency on your behalf. "Not your keys, not your coins."

DCA (Dollar-Cost Averaging) — Investing a fixed amount at regular intervals regardless of price. Eliminates timing risk. The HODLer's accumulation method.

Decentralization — No single point of control or failure. Bitcoin is run by thousands of independent nodes worldwide with no central authority.

DeFi (Decentralized Finance) — Financial services (lending, trading, yield) running on smart contracts, primarily on Ethereum. No banks required.

EIP-1559 — Ethereum Improvement Proposal that introduced fee burning. A portion of every Ethereum transaction fee is burned, reducing supply. Makes ETH potentially deflationary.

Ethereum (ETH) — The world's programmable blockchain. Powers DeFi, NFTs, and smart contracts. HODLer's secondary asset (30% target allocation).

Fiat Currency — Government-issued money (USD, EUR, etc.) backed by government decree, not a hard asset. Subject to inflation through central bank money printing.

FOMO (Fear Of Missing Out) — The anxiety-driven impulse to buy when prices are rising. A primary cause of buying at market tops.

FUD (Fear, Uncertainty, Doubt) — Negative narratives spread to drive down asset prices. HODLers dismiss FUD based on fundamentals, not headlines.

Gas — The fee paid to Ethereum validators for processing transactions and smart contracts. Denominated in Gwei (billionths of ETH).

Halving — The programmed event that cuts Bitcoin's block reward in half every ~4 years. Creates a supply shock that has historically triggered major bull markets.

Hardware Wallet — A physical device (Ledger, Trezor, Coldcard) that stores private keys offline. The gold standard of Bitcoin security.

HODL — "Hold On for Dear Life." The strategy of holding Bitcoin long-term through volatility rather than trading. Originally a typo, now a philosophy.

Hot Wallet — Software wallet connected to the internet. Convenient but less secure than cold/hardware wallets.

Keys (Private/Public) — A cryptographic key pair. The public key generates your Bitcoin address; the private key authorizes transactions. Whoever holds the private key owns the Bitcoin.

Layer 2 (L2) — Scaling solutions built on top of Ethereum that process transactions faster and cheaper. Examples: Optimism, Arbitrum, Base, zkSync.

Ledger — A popular hardware wallet manufacturer. The Nano X and S Plus are industry-standard cold storage devices.

Lightning Network — A Layer 2 scaling solution for Bitcoin enabling instant, low-fee micropayments.

Liquid Staking — Protocols (Lido, Rocket Pool) that allow ETH staking without the 32 ETH minimum, issuing liquid tokens (stETH) in return.

Mempool — The "waiting room" for Bitcoin transactions before they are confirmed in a block. High mempool activity = higher fees.

Mining — The process by which Bitcoin miners validate transactions and add new blocks to the blockchain, earning block rewards in return.

Node — A computer running Bitcoin software that validates and stores the entire blockchain. Running your own node = maximum sovereignty.

Non-Custodial — Holding your own private keys. True Bitcoin ownership. "Your keys, your coins."

Proof of Stake (PoS) — Ethereum's consensus mechanism. Validators stake ETH as collateral to earn the right to validate transactions. Replaces energy-intensive mining.

Proof of Work (PoW) — Bitcoin's consensus mechanism. Miners compete to solve computational puzzles, earning block rewards and transaction fees.

Satoshi Nakamoto — The pseudonymous creator of Bitcoin. Identity unknown. Left the project in 2010. Their legacy is the most important innovation in money in 5,000 years.

Satoshi (sat) — The smallest unit of Bitcoin: 1 sat = 0.00000001 BTC. Important for reminding us that Bitcoin is divisible and accessible to everyone.

Smart Contract — Self-executing code on the blockchain (primarily Ethereum) that runs exactly as programmed without intermediaries.

Staking — Locking ETH as collateral in Ethereum's Proof of Stake system to validate transactions and earn rewards (~4% annually).

Supply Shock — When the circulating supply of an asset becomes significantly constrained. Bitcoin halvings create supply shocks.

Time Preference — The tendency to prefer immediate gratification over delayed rewards. HODLers have LOW time preference: they wait for long-term gains.

Total Market Cap — The total value of all Bitcoin in existence. Calculated as: price per BTC × 21 million.

Transaction Fee — The cost to broadcast a transaction on the Bitcoin network. Paid to miners. Varies based on network congestion.

Volatility — The degree of price fluctuation. Bitcoin's volatility is a feature for long-term investors: volatility creates buying opportunities.

Wallet — Software or hardware that stores your Bitcoin private keys and allows you to send/receive transactions.

Whales — Entities or individuals holding very large amounts of Bitcoin (often millions in value). Their transactions can move markets.

Yield Farming — Staking cryptocurrency on DeFi platforms to earn returns. Riskier than simple holding but potentially more profitable.