Blockchain
What is blockchain, really? A plain-English explainer
Strip away the jargon: a blockchain is a shared record book that thousands of computers keep copies of, and that is what makes it hard to quietly rewrite.
September 26, 2026
L4 News — BLOCKCHAIN · WEB3 · ASSETS
Latest News
Blockchain
What T+0 settlement means, and why Hana Bank's digital bond matters
A Korean bank settled a $100 million bond the same day it was issued. Here is how same-day settlement works and what it changes.
September 22, 2026
Finance News
Currency exchange rates explained: who sets them and why they move
No committee decides what your dollar is worth abroad. Here is the mechanism, and who takes a cut when you convert.
September 24, 2026
Blockchain
Blockchain
What is a smart contract, and how does it actually work?
A plain-English look at the code that runs itself on a blockchain — and why that automation cuts both ways.
August 12, 2026
Blockchain
Public vs private blockchains, explained
A public blockchain lets anyone read, use and verify the record; a private one restricts membership — the public vs private blockchain choice is about access…
July 23, 2026
Blockchain
Layer 1 vs Layer 2, explained
Layer 1 is the base chain where everything settles; Layer 2 is built on top of it — the Layer 1 vs Layer 2 distinction, in plain words.
June 30, 2026
Web3
Web3
Web3 explained: separating the hype from what actually works
A calm audit of the durable ideas behind the buzzword — and the parts that have not earned the marketing fog around them.
September 20, 2026
Web3
Slippage in crypto trading: What it costs you and how to control it
The gap between the price you see and the price you get is a real trading cost. Here is where it comes from and what limits it.
September 13, 2026
Security
Security
How to spot a crypto drainer before it takes your wallet
Crypto drainers are fake sites and apps that ask for one malicious signature — here is the mechanism and the habits that stop it.
August 24, 2026
Security
What is a SIM swap attack, and how does it drain a crypto wallet?
A SIM swap hijacks your phone number, not your seed phrase — but for accounts protected only by a text message, that's often enough to unlock everything.
August 18, 2026
Crypto News
Crypto News
What is a seed phrase, and why does it matter?
A seed phrase is the 12- or 24-word master key to a crypto wallet. Here is what it does, how to store it safely, and how scammers try to steal it.
August 28, 2026
Crypto News
SEC closes another batch of crypto enforcement cases — what it means for newcomers
The regulator's 2025 wind-down of several exchange lawsuits changes legal procedure, not the risks a first-time wallet user faces.
August 26, 2026
Finance News
Finance News
What is a spot bitcoin ETF, and how does it actually work?
A plain-English look at how spot bitcoin ETFs are built, who holds the coins, what they cost, and what changed when regulators allowed funds to trade bitcoin…
August 14, 2026
Finance News
Crypto in retirement accounts: what to know
Yes, U.S. retirement accounts can hold crypto — through self-directed IRAs or employer plans that offer a digital asset option. The mechanics, the rules that…
August 10, 2026
Don't Miss
Crypto News
The SEC's five crypto categories, explained
An SEC interpretive release issued with the CFTC on March 17, 2026 mapped crypto assets into five categories and said certain mining, staking, wrapped tokens…
March 21, 2026
Finance News
What is a CBDC and how does it differ from crypto?
A CBDC is digital money issued by a central bank itself — closer to a digital banknote than to bitcoin, and the difference is the whole story.
February 8, 2026
Web3
What is a token standard? ERC-20 and ERC-721
A token standard is the shared rulebook that lets any wallet hold any token. ERC-20 covers interchangeable units, ERC-721 covers unique ones — here is why that…
July 24, 2026
Security
How airdrop scams work
Free tokens that cost you your wallet: the giveaway exists to collect one signature or one 'gas fee' — everything else is stage design.
July 3, 2026