Prologue
- Post Bitcoin_5

1.
Information needed to understand the cryptocurrency/blockchain market
Blockchain is a market that never existed before_13
Cryptocurrency isn't necessary for blockchain_17
Is Bitcoin a Bombshell?_19
Why Blockchain is a Great Technology, but Not Commercialized_23
Is my coin a PDA or a smartphone?_27
Finance that Only Blockchain Can Do - DeFi_31
- Trustless Smart Contracts_36
- The Difference Between Coins, Tokens, and Cryptocurrencies_39
Why Artists Are Gathering on Blockchain - NFT_41
Metaverse and Blockchain_48
Why It's Tough for Large Companies to Jump into Blockchain_51
Will CBDCs Replace Bitcoin?_54
- Korea Premium is poison_58
- The reason for the high volatility of coins is because of the exchanges_61
The Risks of Low-Cap Coins_64
- I heard someone made hundreds of millions with coins?_68

2.
Understanding cryptocurrency/blockchain technology
- Decentralized Systems and Nodes_73
Bitcoin Miners and Proof of Work_77
Ethereum Validators and Proof-of-Stake_82
- The Meaning of Blocks and Transactions_86
Why Blockchains Need Fees - What is Gas?_89
- The smallest unit of cryptocurrency is a decimal point_93
Why Ethereum Continues to Be Used Despite High Gas Prices_95
Blockchain's Biggest Problem: Scalability_101
How to solve scalability?_105
- The most advanced technology in Layer 2 - What is Rollup?_111
Layer 1 technology: sharding and beacon chain_116
How the Ethereum Blockchain Evolves - What Are EIPs and ERCs?_122
The biggest update in Ethereum history - EIP-1559_125
Why Graphics Cards Might Get Cheaper Soon_131
The Final Puzzle of Platform Blockchain Popularization_136
Staking - Not Unearned Income, But Like Unearned Income_141

3.
Ethereum app ecosystem
- The first practical use case of the Ethereum blockchain - ICO_149
Early Decentralized Exchanges_153
The Birth of Decentralized Stable Tokens_157
The Warring States Period of Decentralized Exchanges_162
Launch of an Exchange Perfectly Fit for Platform Blockchain_167
- The emergence of new usability beyond Defy_175
- Games on the Platform Blockchain_180
What will be the next killer app?_186

4.
What You Need to Know Before Jumping into the Cryptocurrency Market
- The World of Scammers_191
- A bomb that will explode someday - Tether_193
- Really difficult government regulations_197
- Low market maturity_201
- Competition in Platform Blockchain_204
- Update on Blockchain_209
- On-chain data_212
- Cycle and Split Buy/Sell_215
- There is no need to invest directly in coins_219

Author's Note

NFTs, DeFi, blockchain games, and ICOs may all seem like separate industries, but they are actually connected.
These operate together on platform blockchains, all of which originated on Ethereum. Numerous platform blockchains are emerging, driven by the potential of NFTs and DeFi, but a closer look reveals that their usability is not significantly different from Ethereum's.
Therefore, understanding Ethereum is essential to understanding platform blockchains and predicting which ones will survive. Understanding Ethereum is also essential to understanding why NFTs, DeFi, blockchain games, and ICOs have emerged in the market and are being widely adopted.
Most people associate Bitcoin with cryptocurrency, but it's time to take a step forward.