Learn Bitcoin and crypto: plain-language guides
What Bitcoin is, how blockchains work, wallets and seed phrases, and how to spot scams, explained from scratch.
Basics
What is Bitcoin? A plain-language explanation
Bitcoin is an internet-based digital currency that no bank or government controls. Learn how it works, why its price swings so much, and where it…
What is a blockchain and how does it work?
A blockchain is a digital ledger copied across many computers, where recorded entries are practically impossible to change. Understand it through a…
What is cryptocurrency? Beyond Bitcoin
A cryptocurrency is a digital currency or token recorded on a blockchain. Learn the difference between Bitcoin, altcoins, stablecoins and meme…
What is Ethereum? How it differs from Bitcoin
Ethereum is a blockchain that runs programs called smart contracts, not just payments. Understand ether (ETH), gas fees, proof of stake and the…
What is USDT (Tether)? Are stablecoins really safe?
USDT is a stablecoin designed to stay worth one US dollar. Learn how it works, what its risks are, and the USDT scams common in Bangladesh.
What is a crypto wallet? Private keys, seed phrases and addresses
A crypto wallet does not hold coins; it holds your secret keys. Learn the difference between hot and cold wallets, custodial and non-custodial…
How does Bitcoin mining work?
Mining is how new blocks are added to the Bitcoin network, and how new bitcoin is created as a reward. Learn why it uses so much electricity and why…
What is the Bitcoin halving? What changes every four years
The halving is a scheduled event, roughly every four years, that cuts the bitcoin reward miners earn in half. See past halving dates, the effect on…
What is BNB? Binance's coin and its risks
BNB is a coin created by the Binance exchange and used to pay fees on the BNB Chain network. Understand the benefits and risks of such a close tie…
What is Solana (SOL)? The upside and limits of a fast blockchain
Solana is a fast, low-fee blockchain whose currency is SOL. Meme-coin booms made it popular, but the network has also gone down several times in the…
What is XRP? Ripple, cross-border payments and the reality
XRP is the currency of the XRP Ledger, built for fast, cheap cross-border transfers. Learn about its ties to Ripple, its legal history, and common…
Safety and scams
The risks of crypto in Bangladesh: legal, financial and fraud
Crypto transactions are not permitted in Bangladesh, and on top of that come scams, extreme price swings and money you can never recover. Learn what…
10 warning signs of a crypto scam
Guaranteed profits, recruitment bonuses, fees before you can withdraw. The most common signs of crypto-themed fraud in Bangladesh in one checklist.…
What is a seed phrase and how do you keep it safe?
A seed phrase is 12 or 24 words that let anyone who knows them take every coin in your wallet. Learn where to keep it, where never to keep it, and…
Crypto MLM and Ponzi schemes: lessons from MTFE
A Ponzi scheme pays old members' "profits" with new members' money and collapses when recruitment dries up. Understand the structure and its warning…
How to spot fake crypto apps, websites and phishing
Counterfeit exchange and wallet apps, fake airdrop sites and phishing messages wipe people out every day. Learn how to recognise them and what to do.
Going deeper
Why are crypto prices so volatile?
Bitcoin can halve in a year, or double. Understand how supply and demand, speculation, leveraged trading, news and the taka exchange rate move…
What is a crypto exchange? Custody risk and the lessons of FTX
A crypto exchange is an online marketplace for buying and selling crypto. Learn how exchanges work, the risks of leaving coins on them, and why no…
A history of Bitcoin, from 2008 to today
From a research paper to a global market. Bitcoin's birth, its first purchase, the big booms and busts, the ETF approval and the Bangladesh context,…