Disconnecting a wallet versus revoking token approvals: why check both?
After trading on a DEX, disconnecting the website may leave token approvals in place. Disconnecting and revoking an approval do different jobs. It is important to understand what a wallet screen auth…
Token unlocks and vesting: reading a supply-release schedule
A large value on an unlock calendar can make you wonder whether it will all be sold that day. An unlock removes conditions restricting token transfers; it does not itself mean a sale.
What is the Bitcoin halving? Changes when the block subsidy falls
Halving headlines often say Bitcoin's “supply is falling”. More precisely, existing bitcoins do not disappear; the amount newly issued with each block decreases.
Is high trading volume always good? Volume, turnover and liquidity
One coin might trade billions of units a day while another trades only tens of thousands. The first looks busier by count, but differing unit prices make a direct comparison difficult.
Reading an order book: market orders versus limit orders
The displayed current price might be ₩1,000 while a market order executes at ₩1,003. The current price is usually the most recent trade; the price available to you now depends on orders remaining in…
Reading candlestick charts: open, close, high and low
What information fits inside one red or green bar on a chart? A candle shows where the price started and ended over a period and how far it moved. Learn to read a single candle before memorizing patt…
Reading profit-and-loss posts: returns, amounts and realized gains
The first thing that catches the eye in a profit-and-loss post is often a large percentage. Yet the meaning of the same +50% changes with how much was invested, when, and whether the position was act…
What is an airdrop? Eligibility and checks before connecting a wallet
An airdrop is a way for a project to distribute tokens to users. Projects may reward existing users or draw attention to participation. But clicking a link or signing simply because something is desc…
What is staking? APR, APY and withdrawal conditions
A staking screen advertising “5% a year” may remind you of bank interest. But staking relates to participation in network validation, and the coin's price also changes.
How do bridges work? Checks before moving assets to another chain
Using an asset held on Ethereum on another network may require a bridge. Bridges connect assets or messages between different chains. Rather than imagining a coin physically moving, think of a proces…
Liquidity pools and AMMs: how tokens are swapped on a DEX
On a DEX, you may be able to swap tokens without waiting for someone to place the opposite order. Liquidity pools hold assets in advance, and an automated market maker, or AMM, calculates the exchang…
Slippage versus price impact: why you receive fewer tokens than quoted
A swap screen might quote 100 tokens, yet the final amount received is smaller. Besides fees, the price can change between the quote and execution, and your own order can affect the market price.
Calculating the kimchi premium: why a 3% gap is not a 3% profit
The kimchi premium is the difference between a Korean price and an overseas price after converting them to the same currency. A higher Korean price produces a positive premium; a lower one produces a…
Is a ₩1 coin really cheap? Understanding market cap and FDV
A coin priced at ₩1 may look as though it has more room to rise than one priced at ₩100,000. But the price of one unit cannot tell you an asset's market size or fair value. Supply matters too.
Reading a block explorer: checking a transfer with its transaction hash
If you have sent coins but the deposit has not arrived, start with the transaction hash. A block explorer searches transaction and address records on a blockchain.
Have tokens but cannot send them? Check the gas fee
You have USDT in your wallet, but pressing Send produces an insufficient-fee message. The token you hold may differ from the asset used to pay fees. Gas fees pay for processing transactions on a bloc…
How crypto wallets work: addresses, private keys and recovery phrases
Installing a crypto wallet can make it feel as though coins move into your phone. In reality, balances and transactions are recorded on the blockchain; the wallet is a tool for viewing those records…
Why did Vitalik Buterin create Ethereum?
Vitalik Buterin is a name that comes up throughout Ethereum's story. He proposed its initial white paper in 2013, and several co-founders and developers subsequently developed the project.
Bitcoin’s beginnings: from Satoshi’s white paper to Bitcoin Pizza Day
Bitcoin was not always an asset traded on exchanges around the world. It began with a short white paper and software published online. Following its origins by date also reveals the problem it set ou…
Mainnet, L1 and L2: why one wallet address can show different balances
Switch networks in a wallet and the balance at the same address can appear to vanish. The assets may not be gone—you may simply be viewing another network's records.