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Crypto Trading 101

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Lesson 1, Topic 2
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Understanding Blockchain Technology

ATH July 18, 2025
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Blockchain is the backbone of cryptocurrency. It is a distributed, immutable ledger composed of blocks of data that are cryptographically linked. Every time a new transaction occurs, it is verified by the network and added to a new block. Once that block is filled, it is appended to the previous one, forming a chronological chain of data.

Each block contains:

  • A list of transactions
  • A timestamp
  • A reference to the previous block (called a hash)

The decentralized nature of blockchain makes it extremely secure. Since the data is not stored on a central server but on multiple nodes, it is virtually impossible to tamper with the data unless a majority of the network is compromised.

Blockchain has many use cases beyond cryptocurrency, such as supply chain tracking, healthcare data management, and digital identity verification. But in the context of trading, it ensures transparency, fast settlement, and low costs.