Crypto Guides ₿

Your 12-24 word seed phrase IS your wallet. Anyone with it owns your crypto. Never: photograph, cloud-store, email, text, or share. Always: write on paper (multiple copies), consider steel backup (Cryptotag), test recovery with small amount.

1) Hardware wallet for >$1K. 2) Never share seed. 3) 2FA everywhere (not SMS). 4) Unique password per exchange. 5) Verify addresses on device. 6) Small test transactions first. 7) Revoke old token approvals (revoke.cash). 8) Don't click DM links. 9) Bookmark exchanges. 10) Assume every DM is phishing.

The first cryptocurrency. Launched 2009 by pseudonymous Satoshi Nakamoto. Hard cap of 21M coins, proof-of-work. Store-of-value narrative dominant. Most-traded crypto globally.

Launched 2015 by Vitalik Buterin. Turing-complete smart contracts. Powers most DeFi, NFTs, L2s. Moved to proof-of-stake in 2022 (The Merge), cutting energy 99.95%.

Buy only from official site (never Amazon/eBay — tampering risk). Generate seed phrase offline. Write it on paper or steel (NEVER screenshot or cloud-store). Verify receiving addresses on device screen. Test with small amount first.

The IRS classifies cryptocurrency as property, not currency. This has important tax consequences. Every sale, swap, or exchange of crypto is a taxable event — not just converting to dollars. Buying crypto with dollars is not taxable; selling, swapping crypto-to-crypto, or spending crypto triggers a capital gain or loss. Short-term gains (held less than one year) are taxed as ordinary income (10-37% depending on bracket). Long-term gains (held more than one year) are taxed at lower rates (0%, 15%, or 20% for most taxpayers). Receiving crypto as income, staking rewards, or mining income is generally taxed as ordinary income at the fair market value on the date received. Use reputable crypto tax software (Koinly, CoinTracker, TaxBit) to calculate gains from exchange histories. For educational purposes only — consult a qualified tax professional for your specific situation.

A crypto wallet does not hold coins like a physical wallet holds cash — it holds the private keys that prove ownership on the blockchain. There are two main types. Custodial wallets (Coinbase, Kraken, Binance) keep the private keys on your behalf, meaning the exchange controls your funds. If the exchange is hacked or goes bankrupt (FTX, Celsius), your funds are at risk. Self-custody wallets (Ledger, Trezor, MetaMask) give you the private keys directly. You are fully in control, but you are also fully responsible — losing your 12-24 word seed phrase means permanent, unrecoverable loss. Best practice: use a custodial exchange to buy and trade, then move meaningful holdings to a hardware wallet. Never keep more on an exchange than you would be comfortable losing.

Anonymous team, unaudited code, liquidity not locked, promises of guaranteed returns, massive Telegram hype with no substance — all red flags. Verify contracts on Etherscan, check liquidity lock, never trust "100x" promises.

Supply crypto, earn yield. Borrow against crypto collateral. Flash loans (borrow + repay in one tx). Multi-chain, audited heavily, largest TVL in DeFi lending.

A whitepaper is the founding document of a crypto project — it describes the problem, the solution, the technical architecture, and the token economics. Before investing in any project beyond Bitcoin and Ethereum, read the whitepaper and ask: (1) Does it solve a real problem, or does it just add a token to something that works without one? (2) Is the team named, with verifiable experience? (3) Is the token distribution fair — less than 50% to team/VCs? (4) Is there a working product, not just a roadmap? (5) Has the code been audited by a reputable firm (CertiK, Trail of Bits, OpenZeppelin)? If any answer is unclear or missing, treat it as a red flag. Most altcoin failures are predictable from the whitepaper alone.

Leaving crypto on an exchange means the exchange owns it. FTX, Celsius, Mt. Gox all lost billions of user funds. Self-custody (hardware wallet like Ledger/Trezor) puts YOU in control. Trade-off: if you lose the seed phrase, funds are gone forever.

Leading hardware wallet brand. Supports 5500+ coins. Bluetooth for mobile, USB-C. 2020 customer data leak caused phishing waves but wallets themselves were not compromised.

Leading Ethereum DEX. Swap any ERC-20 without KYC. Uses automated market maker (AMM) model. V4 hooks add programmability.

Every 210,000 blocks (approximately every 4 years), the reward that Bitcoin miners receive for processing transactions is cut in half — this is the Bitcoin halving. At launch in 2009, miners received 50 BTC per block. After three halvings (2012, 2016, 2020), the reward was 6.25 BTC. The April 2024 halving reduced it to 3.125 BTC. The final Bitcoin (completing the 21 million cap) will be mined around the year 2140. Halvings matter because they reduce the rate of new supply entering circulation. Whether halvings cause price increases is debated — historical patterns exist, but past performance does not predict future results. The mechanism is built into Bitcoin's code and will occur automatically regardless of price or market conditions.

Open-source firmware, color touchscreen. Fewer coins than Ledger but fully auditable. Made by SatoshiLabs (Czech Republic).

Built for speed. ~65K transactions per second, sub-cent fees. Popular for DEX, memecoins, mobile wallets. Had multi-hour outages in 2022 but stability improved.

Veteran US exchange (founded 2011). Strong security record. Higher fees than Binance but better trust. Good staking yields.

Browser extension + mobile app. 30M+ users. Connects to every DApp. Hot wallet (internet-connected) — risky for large sums, perfect for daily DeFi.

Largest global exchange. Huge coin selection, lowest fees (0.1% spot). Regulatory issues in multiple jurisdictions. No longer serves US mainland.

Public US company. Highest compliance + regulation in the US. Easy onboarding, high fees for casual users (use Coinbase Advanced for pro fees).

A blockchain is a shared database replicated across thousands of computers where new data (blocks) is cryptographically linked to previous data — making tampering effectively impossible. Not every blockchain is crypto, but every crypto uses one.

PoW (Bitcoin) secures via energy-intensive computing puzzles. PoS (Ethereum post-Merge) secures via validators locking up ("staking") coins. PoS is 99%+ more energy-efficient but critics argue PoW is more decentralized.

1) Pick an exchange (Coinbase, Kraken, Binance). 2) Verify identity (KYC). 3) Deposit fiat (bank transfer cheaper than card). 4) Buy (start with BTC or ETH). 5) Transfer to a personal wallet. Total time ~1 day for verification.

USDT (Tether) is the biggest by volume — centralized, controversial reserves. USDC (Circle) is the most regulated. DAI is decentralized and backed by over-collateralized crypto. All three peg to $1.

DeFi = financial services (lending, swapping, insurance, derivatives) running on smart contracts, no bank. Major protocols: Aave (lending), Uniswap (swaps), Compound (lending), Curve (stablecoin swaps).

Staking = locking tokens to secure a PoS network (low risk, 3-8% APY). Yield farming = moving between DeFi protocols for higher APY (high risk, 10-100%+). Farming can lose money via impermanent loss or protocol exploits.

In most countries, every crypto-to-crypto trade is a taxable event (not just crypto-to-fiat). DeFi, NFTs, staking rewards all count. Use Koinly or CoinTracker to automate. Ignoring this = legal trouble.

Decentralized Autonomous Organization — a group that coordinates via smart contracts and token-holder votes instead of CEOs. MakerDAO, Uniswap DAO, Nouns DAO are prominent examples. Governance is messy but transparent.

Post-2022 crash, NFTs are finding real use: event tickets (Ticketmaster), in-game items, music royalties, real-estate titles, domain names (ENS). The speculative JPEG era is over; utility NFTs persist.

L2s process transactions off the main Ethereum chain, then bundle proofs back. Results: ~10-100x cheaper and faster. Arbitrum, Optimism, and Base (Coinbase) are the Big 3. Most DeFi has migrated here.

Cold wallet = offline (hardware or paper). Hot wallet = online (MetaMask, exchange). Cold = safer for HODL. Hot = convenient for daily DeFi. Serious holders use both: cold for 90%, hot for active capital.

Approved Jan 2024. Lets you buy BTC exposure via traditional brokers (Fidelity FBTC, BlackRock IBIT, Grayscale GBTC). Pros: simple, tax-advantaged in IRAs. Cons: you don't own real BTC, management fees.

Buy a fixed dollar amount every week/month regardless of price. Removes emotion. Over BTC's history, weekly $10 DCA outperformed 90%+ of timed trades. Boring, but it works.

Team (doxxed? track record?), tokenomics (fair launch? VC dumps?), whitepaper (coherent?), community (organic or bought?), code (audited by reputable firm?). If any one fails, walk away.