Blockchain fundamentals

The history of DeFi: Dai, Uniswap, liquidity incentives and tokenized assets, explaining evolving mechanisms and remaining risks.

Installation, recovery phrases, social access and permissions: what to check before using a MetaMask wallet.

History of Bitcoin: who Satoshi Nakamoto was, why it emerged in 2008, how it solved double spending and why it still matters as a monetary base layer in 2026.

What blockchain brings to a business, how it works under the hood and when it is worth using: payments, asset tokenization, traceability and shared records.

How to assess DeFi around Bitcoin: execution, bridges, custody and withdrawals in Lightning, Rootstock and Stacks, including their limitations.

Native coins, tokens and crypto-assets: differences in implementation, functions and rights that cannot be inferred from the name alone.

Bitcoin’s halving reduces the subsidy every 210,000 blocks. The next target height, issuance calculation and distinction between subsidy, fees and price.

PoW and PoS compared through Bitcoin and Ethereum: validation, finality, energy, attacks and criteria for evaluating a blockchain.

Seven properties of blockchain networks, what they help verify and their limits for cost, privacy, security and external data.