Exchanges
A centralized exchange is a company that holds your funds, runs an internal order book and matches trades. A decentralized exchange is a smart contract that holds liquidity, letting you trade directly from your own wallet with no account and no custodian. The core difference is custody: on a CEX somebody else holds your keys, on a DEX you do.
The difference in one sentence
On a centralized exchange, you are trusting a company. On a decentralized exchange, you are trusting code. Both can fail. They fail in completely different ways, and the failure modes are what actually matter.
Side by side
| Centralized exchange | Decentralized exchange | |
|---|---|---|
| Who holds your funds | The company | You, in your own wallet |
| Account required | Yes, with identity verification | No. Your wallet is the account |
| Fiat on ramp | Yes, bank transfers and cards | No. You need crypto already |
| Assets available | A curated, regulated list | Anything anyone has created a pool for |
| Typical fees | 0 to 0.6 percent on advanced interfaces | 0.05 to 1 percent pool fee plus gas |
| Speed | Instant, it is a database write | Seconds, it is a blockchain transaction |
| Order types | Limit, market, stop, and more | Mostly market swaps, with some limit support |
| If you lose access | Password reset and support | Nothing. Your recovery phrase is the only route |
| If they get hacked | Your funds may be gone | Your wallet is unaffected unless you approved something |
| Can freeze you | Yes, and does, for legal and compliance reasons | No. There is no account to freeze |
| Support | Yes, of variable quality | None whatsoever |
The risks are not the same size, they are different shapes
Centralized exchange risks
What can go wrong
- The company becomes insolvent and withdrawals stop. This has happened repeatedly
- Your account is frozen during a compliance review, sometimes for weeks
- The exchange is hacked and customer funds are taken
- Regulatory action restricts your access without warning
- You cannot lose funds by signing the wrong thing
- Support can sometimes recover an account
Decentralized exchange risks
What can go wrong
- You approve a malicious contract and it drains your wallet
- You buy a fake token with the same name as a real one
- A bug in the contract is exploited and pooled funds are taken
- You lose your recovery phrase and everything is gone permanently
- No company can fail with your money, because none holds it
- No account to freeze, no permission to revoke
Which is actually cheaper
It depends heavily on size and network.
| Scenario | Cheaper option | Roughly |
|---|---|---|
| $100 of Bitcoin | Centralized exchange, advanced interface | Well under a dollar |
| $100 swap on Ethereum mainnet | Centralized exchange | Gas alone can exceed the trade value proportionally |
| $100 swap on Base or Solana | Decentralized exchange | Total cost of a few cents |
| $50,000 of a major asset | Centralized exchange | Deeper books mean less price impact |
| A token not listed on any exchange | Decentralized exchange | It is the only option that exists |
The setup most people end up with
A centralized exchange for dollars in and out
One regulated account for converting between your bank and crypto. Keep a working balance, not a life savings.
A self custody wallet for holding
Long term holdings live where you control the keys. Self custody covers doing this properly.
A DEX for anything onchain
New tokens, DeFi, liquidity, anything not listed on a regulated venue.
A hardware wallet as the vault
Once the amount matters, keys belong on a device that never touches the internet.
Common questions
Is a DEX safer than a CEX?
Neither is safer in general. A DEX removes the risk of a company failing with your money, and adds the risk of you signing something harmful with no way to undo it. Which is safer depends on how careful you are.
Can I use a DEX without an exchange account?
Only if you already have crypto. DEXs do not accept dollars, so almost everyone starts on a centralized exchange to get their first coins.
Do DEXs require identity verification?
Generally no. Some front ends restrict certain jurisdictions, and the underlying contracts do not check anything. Tax obligations still apply to your trades regardless.
Which should a beginner use first?
A centralized exchange, to complete a first purchase. Then move a small amount to a wallet and do one swap on a cheap network. Doing both once teaches you more than reading about either.
Where to go next
Want us to set both up with you?
A session covers a regulated exchange account, a self custody wallet, a transfer between them and your first onchain swap. About ninety minutes, and you will have done every step once.