₿ Cryptocurrency

⛓️ What is Blockchain?

Blockchain is a Distributed Ledger — information is stored in "blocks" linked together by cryptography. Each block contains transaction records. Once recorded, data is immutable (Immutable) and everyone on the network has the same copy, eliminating the need for intermediaries (banks, governments)

Key properties: Decentralized · Transparent · Cryptographic Security · Immutable

Consensus Mechanisms

• Proof of Work (PoW) — uses computing power to solve math puzzles (Mining). Very energy-intensive. Bitcoin uses this system. Highest security
• Proof of Stake (PoS) — coin holders "Stake" their coins as collateral to validate transactions. 99% more energy-efficient. Ethereum switched to PoS (The Merge, Sep 2022)

🪙 Bitcoin (BTC) — King of Crypto

Bitcoin was created in 2009 by Satoshi Nakamoto (pseudonym, true identity unknown). The world's first cryptocurrency. Market cap ~$1.3 trillion (#1). Often called "Digital Gold"

• Fixed Supply: only 21 million BTC will ever exist — this scarcity is the core of BTC's value
• Bitcoin Halving: every 4 years (or every 210,000 blocks), the BTC mining reward is halved:
  — 2012: 50 → 25 BTC/block
  — 2016: 25 → 12.5 BTC
  — 2020: 12.5 → 6.25 BTC
  — 2024: 6.25 → 3.125 BTC
  — 2028 (projected): 3.125 → 1.5625 BTC
  Historically, each Bitcoin Halving has been followed by a major Bull Run within 12-18 months
• BTC Spot ETF: approved by the US SEC in January 2024 — opened the door for institutions and large funds to invest in Bitcoin via stocks

💎 Ethereum (ETH) — Smart Contract Platform

Ethereum launched in 2015 by Vitalik Buterin it's not just crypto — it's a decentralized computing platform that lets developers build applications on the blockchain (Smart Contracts → dApps)

• Smart Contract — programs that execute automatically on the blockchain when conditions are met. e.g. "if A pays 1 ETH to B → transfer NFT to A" — no intermediary needed
• Gas Fee — transaction fee on Ethereum, paid in ETH. Fluctuates with network congestion
• EIP-1559 (Aug 2021) — fee reform: split into Base Fee (burned → ETH deflationary) + Tip (to miner/validator)
• Layer 2 (L2) Solutions: Arbitrum, Optimism, Base, zkSync — make Ethereum transactions much faster and cheaper

🪙 Stablecoins and Altcoins

Stablecoin — Price-Stable Crypto

• USDT (Tether) — #1 by market cap, ~$100 billion. Pegged 1:1 to USD. Controversy over reserve transparency
• USDC (USD Coin) — issued by Circle, audited monthly by Deloitte. More transparent than USDT
• DAI — Decentralized stablecoin on Ethereum. Maintains value through Smart Contracts and over-collateralization

Notable Altcoins

• SOL (Solana) — High-speed blockchain, low fees, uses Proof of History (PoH). Strength: supports large-scale applications
• BNB (Binance Coin) — Binance's coin — used to reduce trading fees and as the native token on BNB Chain
• XRP (Ripple) — focused on cross-border transfers — fast and low fees. Has an ongoing lawsuit with the US SEC
• ADA (Cardano) — blockchain focused on academic peer-reviewed research before development
• DOGE (Dogecoin) — started as a meme joke but has a large community. Supported by Elon Musk

🏦 DeFi (Decentralized Finance)

DeFi is a financial system that runs on the blockchain without relying on banks or brokers — everything operates through Smart Contracts:

• DEX (Decentralized Exchange): Uniswap, SushiSwap, PancakeSwap — swap coins without depositing funds at an exchange
• Lending & Borrowing: Aave, Compound — deposit coins to earn interest or borrow against collateral
• Liquidity Pool (LP): Liquidity Providers (LP) deposit coin pairs in DEX and earn trading fees
• Impermanent Loss: LP risk — when the price ratio of the pair changes, the withdrawn value may be less than simply holding the coins
• Yield Farming: deposit coins in various protocols to earn returns (APY) — higher APY = higher risk
• TVL (Total Value Locked): Total Value Locked in DeFi protocols — used as a measure of popularity and confidence

🥩 Staking & Yield Farming

• Staking (PoS): lock coins to help validate transactions on PoS networks — earn ~3-8% APY. e.g. Stake ETH, SOL, ADA, DOT
• Liquid Staking: Lido (stETH), Rocket Pool (rETH) — receive a representative token while staking, providing liquidity to use in DeFi
• Yield Farming: deposit coins in Liquidity Pools or Lending Protocols — APY fluctuates with demand and token emissions
• APR vs APY: APR = simple interest rate · APY = interest rate including compounding effect

🖼️ NFT (Non-Fungible Token)

NFTs are tokens that are non-fungible (each is unique) used to prove ownership of digital assets like art, music, video, in-game items:

• Token standards: ERC-721 (1 token = 1 item), ERC-1155 (1 token = multiple items)
• Major NFT markets: OpenSea, Blur, Magic Eden (Solana), Rarible
• NFT Blue Chip: CryptoPunks, Bored Ape Yacht Club (BAYC), Azuki, Pudgy Penguins
• Creator Royalty: artists earn 2.5-10% royalty every time their NFT is resold — lifetime revenue
• Use cases beyond art: Music NFT, Gaming Items, Virtual Land (Metaverse), Tokenized Real-World Assets, Domain Names (ENS)

🔐 Wallet — How to Store Crypto Safely

🔑 Golden Rule: NEVER share your Seed Phrase / Private Key with anyone! No legitimate wallet support team will ever ask for your Seed Phrase "Not your keys, not your coins."

🔍 On-chain Analysis — Reading Blockchain Data

Because the blockchain is transparent — all transactions are permanently recorded, allowing analysts to read data and understand market behavior:

• Glassnode / CryptoQuant — tracks Exchange Inflow/Outflow, Miner Reserve, HODL Wave, MVRV Ratio, NUPL
• Nansen — tracks Smart Money — what whales and institutions are doing
• Dune Analytics — build custom dashboards to analyze blockchain data
• Key metrics:
  — Exchange Netflow: BTC flowing to exchanges = selling pressure; flowing out = holding (Bullish)
  — Stablecoin Supply: USDT/USDC supply increasing = capital ready to enter (Bullish)
  — MVRV Ratio: Market Value ÷ Realized Value — above 3.7 = market may be overheated
  — Puell Multiple: miner revenue ÷ 365-day average — measures whether miners are selling abnormally

🏢 Exchange — Crypto Trading Platforms

• CEX (Centralized Exchange): Binance (largest), Coinbase, OKX, Bybit, Kraken — order matching, deposits/withdrawals similar to brokers. Cons: requires KYC, funds held at the exchange (risk if it fails)
• DEX (Decentralized Exchange): Uniswap, SushiSwap, PancakeSwap — trade without depositing funds, using Smart Contracts. Pros: no KYC, you hold your Private Keys. Cons: expensive Gas Fees during network congestion
• Thai Exchanges: Bitkub, Orbix (formerly Saturn), Bitazza, Upbit Thailand — legally operating under SEC regulation

⚖️ Crypto Regulations in Thailand

• Emergency Decree on Digital Assets (2018) — main crypto law. Requires SEC approval for issuing and selling Digital Tokens
• SEC Thailand — main regulator overseeing Exchanges, Brokers, and ICO Portals in Thailand
• Crypto Tax: profits from selling crypto are considered "income" and are taxable. Losses can be offset against gains (similar to stocks). Tax rate: 15% withholding or progressive personal income tax
• Licensed Exchanges in Thailand: Bitkub, Orbix, Bitazza, Upbit Thailand, ERX, T-BOX (Digital Token only)