Denmark based CASP4.8/5Guide · Crypto basics · Updated 21 July 2026 · 3 min read
Crypto wallet vs exchange: where to keep your crypto
When you own crypto, it has to be stored somewhere. The two main models are a regulated platform that holds it for you (custodial), and your own wallet where you hold the keys (self-custody). This guide explains the difference, the benefits and the responsibility. It is educational, not advice.
The short version
- Custodial: the platform holds the keys — simple, with support and recovery, but with counterparty dependence.
- Self-custody: you hold the keys — full control, but a lost seed phrase can mean funds lost forever.
- Penning is a third model: regulated purchase with delivery straight to your own wallet — self-custody from the start.
- Many combine both: a regulated platform for trading, their own wallet for long-term storage.
Two ways to store crypto
With custodial storage, a platform holds your assets and the associated keys for you — much like a bank holds your money. With self-custody, you hold the keys yourself in a wallet (e.g. a hardware or software wallet), and only you have access.
| Custodial platform | Your own wallet | |
|---|---|---|
| Who holds the keys | The platform (or its custodian) | You |
| Recovery if you lose access | Support and account recovery | None — a lost seed phrase can mean lost funds |
| Counterparty risk | Regulated and supervised under MiCA, but present | No intermediary |
| Responsibility sits with | The platform’s security plus your account hygiene | You alone: keys, backups, phishing |
What a regulated platform does
A regulated CASP under MiCA that holds client assets must keep them segregated — separate from the company’s own funds — and is supervised. That reduces counterparty risk compared with an unregulated exchange.
Penning is supervised by the Danish FSA but holds no client crypto: when you buy through Penning, the assets are delivered directly to your own wallet — you hold the keys from the start.
Self-custody: full control, full responsibility
With self-custody there is no intermediary — but if you lose your seed phrase or keys, there is no "forgot password". You are responsible for security, backups and avoiding phishing.
Many people use a combination: a regulated platform to buy and trade, and their own wallet for long-term storage of larger holdings.
How to choose
- Want simplicity and support? — A custodial CASP with recovery and customer service is a good starting point — verify the authorisation first.
- Want maximum control? — Self-custody suits you if you are comfortable managing keys and backups yourself.
- Want both? — Buy through a regulated platform that delivers to your own wallet — regulated trading and self-custody at once.
Either way: use a regulated platform to buy and trade, verify its authorisation, and understand the risk of the crypto asset itself.
Frequently asked questions
This guide is educational and not advice. Both custodial and self-custody carry risks. Verify a provider’s authorisation, and protect your own keys and backups.
Buy on a platform — hold in your own wallet
Penning brokers your trade and delivers crypto straight to your own wallet — regulated purchase and self-custody from the start.