1.5.5.6 Direct Acrylic Graph

1.5.6 Nodes

1.5.7 Shared Replicated Ledger

1.5.8 Smart Contracts

1.5.9 Native Token

1.5.10 Gossip Network for Message Propagation

1.5.11 Hard Fork and Soft Fork

1.6 How Bitcoin Blockchain Works

1.6.1 Mining

1.6.2 Proof of Work

1.6.3 Consensus with Proof of Work

1.6.4 DAPPS

1.7 Threats & Challenges in Public Blockchains

1.7.1 Double Spending

1.7.2 Sybil Attack

1.7.3 DDoS Attack

1.8 Permission Levels

1.9 Does your Use Case need a Blockchain?

1.9.1 When to use a RDBMS

1.9.2 Where to Use a Public Blockchain

1.9.3 Where to Use a Private/Permissioned Blockchain

1.10 Cap Theorem or The Scalability Trilemma

1.11 Bitcoin, The Environment Villain

1.12 Areas of research and improvement

1.12.1 Consensus Model

1.12.2 Scalability and Performance

1.12.3 Transaction Fees

1.12.4 Layer-2 Solutions

1.12.4.1 Sharding

1.12.4.2 State Channels

1.12.4.3 Parachains

1.12.4.4 Sidechains

1.12.4.5 Rollups

1.13 Reason for the Volatile Price of Crypto

1.13.1 Utility

1.13.2 Limited vs. Unlimited Supply

1.13.3 Hoarding