Learning collection
Core network explainers for Bitcoin, Ethereum, proof of work, proof of stake, gas, and smart contracts.
Prefer a guided sequence? Follow the Bitcoin and Ethereum Foundations.
Bitcoin is the first widely adopted public cryptocurrency network. It is best understood as a payment and settlement system with strict issuance rules, public verification, and proof-of-work mining.
Bitcoin
Ethereum is a programmable blockchain network. It supports smart contracts, decentralized applications, token standards, and many experiments in open financial and ownership systems.
Ethereum and Smart Contracts
Smart contracts are programs deployed to a blockchain. They can hold assets, enforce rules, and coordinate user actions, but they are only as reliable as their code and surrounding design.
Ethereum and Smart Contracts
Crypto mining is the process used by proof-of-work networks to propose blocks and secure transaction history. It is technical, competitive, and very different from simply receiving free coins.
Mining and Proof of Work
Gas fees are transaction fees paid to use networks such as Ethereum. They help allocate scarce block space and compensate participants who process transactions.
Ethereum and Smart Contracts
Staking is participation in proof-of-stake network security by locking or delegating assets under protocol rules. It can involve rewards, but it is not guaranteed passive income.
Ethereum and Smart Contracts
The Bitcoin halving is a scheduled reduction in the block subsidy paid to miners. It is part of Bitcoin's issuance design, not a guaranteed market signal.
Bitcoin
Bitcoin transaction fees help users compete for limited block space. Fee choices can affect confirmation speed, cost, and user experience.
Bitcoin Transactions
The Lightning Network is a payment-channel system built around Bitcoin that aims to make smaller, faster payments more practical.
Bitcoin Scaling
Ethereum validators help propose and attest to blocks in proof of stake. Validator participation supports consensus but involves technical and economic responsibilities.
Ethereum Staking
Ethereum rollups are Layer 2 scaling systems that batch activity and use Ethereum for important settlement, data, or verification functions.
Layer 2 Networks
Token standards define common rules that wallets and applications can understand. They improve compatibility but do not prove that a token is valuable or safe.
Smart Contracts
ERC-20 is a common token standard for fungible tokens. It helps wallets and applications recognize balances, transfers, and approvals.
Smart Contracts
Smart contract audits review code for vulnerabilities and design issues, but an audit is one signal, not a guarantee that a protocol is safe.
Smart Contracts
Bitcoin mining hardware is specialized equipment that performs repeated computations to compete for new blocks. Understanding hardware helps readers separate technical mining from unrealistic profit claims.
Crypto Mining
Mining pools let miners combine hash rate and share rewards according to pool rules. They can smooth payouts but introduce trust, fee, and centralization questions.
Crypto Mining
Solo mining and pool mining use the same network rules but produce very different reward patterns. Pool mining smooths variance, while solo mining requires enough hash rate to tolerate long odds.
Crypto Mining
Cloud mining sells access to remote mining capacity, but beginners should be cautious with guaranteed-return claims, opaque operators, fees, and unverifiable hardware.
Crypto Mining
Proof-of-work mining uses energy because miners compete to secure blocks through computation. Energy analysis should consider network design, location, power sources, and claim quality.
Crypto Mining
Mining difficulty adjusts how hard it is to find a valid proof-of-work block. It helps networks target a block schedule even as total mining power changes.
Crypto Mining
Bitcoin does not track balances like a bank account. It tracks unspent transaction outputs, or UTXOs, that wallets select and spend in later transactions.
Bitcoin Fundamentals
The Bitcoin mempool is where valid unconfirmed transactions wait before miners include them in blocks. Fee rates and network demand affect how quickly transactions confirm.
Bitcoin Transactions
A Bitcoin private key is secret data that can authorize spending. Anyone who controls the relevant private key can move the associated bitcoin under network rules.
Bitcoin Security