Learn Crypto with Bit.Fan Academy

From beginner to advanced — master exchanges, wallets and blockchain essentials

digital signatures

What Is Bitcoin? Everything You Need to Know in 2026

Key Takeaways Bitcoin’s supply is limited to 21 million bitcoins. By comparison, fiat currencies like the USD grow in supply, decreasing their value. The Bitcoin blockchain serves as an immutable record of transactions. By contrast, traditional finance requires banks and financial institutions to track transactions accurately. Bitcoin’s value comes in part from its security. The Bitcoin network uses proof of work as both an incentive to keep the blockchain going and a disincentive for bad actors due to the cost involved with proof of work.

2026-07-17

What Is Bitcoin? Everything You Need to Know in 2026

Is Bitcoin Quantum Resistant? What the Risk Really Is

Bitcoin is not fully quantum resistant. Hashing and signatures face different risks, and exposed public keys are the main concern.

What a Bitcoin Transaction Includes

A bitcoin transaction includes inputs, outputs, amounts, fees, and signatures. Understanding each part makes transfers and change easier to read.

What Hash Does Bitcoin Use? SHA-256 Explained

Bitcoin uses SHA-256 as its core hash function. This guide explains where it is used, how it works in mining, and how to spot hash-themed scams.

How to Fake Bitcoins? What Scammers Really Fake

How to fake bitcoins? Real bitcoin cannot be forged casually. Most scams fake payment proof, wallet balances, or exchange deposits.

How Does Bitcoin Work? A Simple Explanation

How does Bitcoin work? It uses digital signatures, miners, and a public blockchain to verify transfers without a bank.

What Is Bitcoin Encryption? A Beginner’s Guide

Bitcoin encryption refers to the cryptography behind wallets, signatures, and transaction checks, not a hidden ledger no one can see.

How Bitcoin Prevents Double Spending

Bitcoin prevents double spending through network validation, block inclusion, proof of work, and confirmations that lock in one valid history.