Personal Wallet
Self-custody wallet · Non-custodial wallet · Unhosted wallet · External wallet
A wallet where you, not an exchange, hold the keys (private key and seed phrase) that move your coins.
Simple explanation
Background: Korean exchanges let you withdraw to a personal wallet only after you register its address and confirm it is yours, and Korea's rules for transfers to personal wallets tighten further from 2027.
Coins on an exchange actually sit in wallets the exchange controls; your account just records how much of them is yours. The exchange holds the private keys that can move those coins, which is why this is called custody. A personal wallet is one where you hold the keys yourself. It helps to think of a wallet not as a box that holds coins, but as a tool that keeps the keys able to move the coins at your address on the blockchain.
Personal wallets come in two broad kinds. A hot wallet keeps its keys on an internet-connected device, such as a phone app or a browser extension: easy to use, but exposed to malware and fake websites. A cold wallet, such as a hardware wallet, keeps its keys away from the internet: safer, but more work, since you connect the device and approve each transfer on it. Even a cold wallet can be drained if you type its seed phrase into a fake recovery page or sign a malicious approval.
When you create a wallet you are usually shown a seed phrase (also called a recovery phrase or mnemonic) of 12 or 24 English words. With those words you can rebuild the same wallet on another device even if you lose the first one. Lose the phrase and nobody can recover it for you; let someone else see it and they can take every coin in the wallet. Do not keep it in photos, cloud storage or messengers; write it on paper and keep it somewhere safe. Anyone or any site asking you to type in or share your seed phrase should be treated as a scam.
The upside is that your coins are out of reach of exchange problems: hacks, bankruptcies, deposit and withdrawal suspensions. The downside is that every mistake is yours. Send to the wrong address or network and there is no way back, and no help desk to call. You also pay network fees yourself, so to send a token on the Ethereum network, for example, you need a little ether (ETH) in the wallet for the fee.
Exchanges split customer coins between hot and cold wallets too. Korea's Virtual Asset User Protection Act and its decree require exchanges to keep at least 80% of customers' virtual assets in cold wallets cut off from the internet. In November 2025, about ₩44.5 billion (about $32 million) of Solana-network assets left an Upbit hot wallet in a hack (Upbit said it would cover members' losses from its own assets), and exchanges have since been pushing their cold-wallet share even higher. A high cold-wallet share can slow withdrawals when many come at once, while coins are moved into the hot wallet.
To withdraw from a Korean exchange to a personal wallet, you first register the address as a withdrawal address and go through a check that it is yours; the method and the wallets supported differ by exchange. Upbit from 13 February 2025, and Bithumb from 1 April 2025, began blocking withdrawals to unregistered addresses even below ₩1,000,000 (about $710), except transfers to exchanges linked through the Travel Rule system. For ₩1,000,000 or more, this registration and check have been needed since the Travel Rule started in 2022. Deposits from a personal wallet can also need a check on where they came from, depending on the exchange, before they are credited.
More change is on the way. An amended enforcement decree of Korea's Act on Reporting and Using Specified Financial Transaction Information, passed by the cabinet on 11 August 2026, is due to apply from six months after promulgation (around February 2027). It scraps the ₩1,000,000 Travel Rule threshold so that the rule covers every transfer, and sets how far transfers with overseas exchanges and personal wallets are allowed according to the counterparty's risk. According to a law firm's commentary, transfers with personal wallets, and with overseas exchanges not rated low-risk, will be allowed only when the sender and the receiver are the same person, that is, your own wallet. Separately, ahead of the amended Foreign Exchange Transactions Act due to take effect on 3 December 2026, a draft decree published in October 2026 would have records of transfers between Korean exchanges and overseas exchanges or personal wallets reported to the Bank of Korea's foreign exchange data network. This is not legal advice; check exchange notices and official announcements for when and how each rule applies.
For the kimchi premium, routing coins through a personal wallet does not get around anything: every move in or out of an exchange still pays the withdrawal fee and goes through address registration and Travel Rule checks, and the extra hop adds time. When a coin is being delisted, you can move it during the withdrawal window to a personal wallet that supports it and keep holding it. CoinGaja's Deposit and withdrawal suspensions page shows each exchange's deposit and withdrawal status, and its Listings and delistings page shows delisting dates.
Example
0.1 BTC on an exchange (at ₩100,000,000 per bitcoin, about $71,400, that is ₩10,000,000, about $7,140)
Withdraw to your registered personal wallet; with a withdrawal fee of 0.0005 BTC → 0.0995 BTC arrives (₩9,950,000, about $7,110)
Later you send it back to the exchange and pay a network fee of 0.00002 BTC from the wallet → 0.09948 BTC arrives
Round-trip fees 0.0005 + 0.00002 = 0.00052 BTC → ₩100,000,000 × 0.00052 = ₩52,000 (about $37)
Lose the 12-word (or 24-word) seed phrase → there is no way to get the 0.0995 BTC in the wallet back
※ Example numbers, for illustration only
See it on CoinGaja
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