The advertised fee is rarely the fee you pay
Exchange comparison tables almost always rank on the trading fee, because it is the number
exchanges publish most prominently. It is also, for most people, the smallest of the three
costs they will actually incur. The spread between the buy and sell price on the instant-buy
screen, and the withdrawal fee charged when the coin leaves, routinely dwarf it.
The gap is largest exactly where beginners transact. A platform advertising a fraction of a
percent on its trading pairs may apply a several-percent spread to the simplified purchase
flow, which is the one a first-time buyer uses. Both figures are disclosed, on different
pages, in different units.
- Trading fee
- Advertised
- Instant-buy spread
- Disclosed elsewhere
- Withdrawal fee
- Per asset
- Network fee
- Varies by chain
Withdrawal limits are the constraint that surprises people
Deposits are frictionless everywhere; that is the part exchanges compete on. Getting funds out
is where the differences live, and they are usually expressed as a verification tier rather
than a fee. A daily ceiling that was irrelevant while you were accumulating becomes the entire
problem the week you want to move a position.
Worth checking before the first deposit rather than after: what the limit is at your current
verification level, what raising it requires, and how long that review takes when the platform
is busy. Those three answers are more predictive of your experience than any fee comparison.
A balance on an exchange is a claim, not a holding
While coin sits on a platform, the platform holds the key and you hold a database entry saying
it owes you. That arrangement works until it does not, and the history of this industry is
largely a history of it not working, through insolvency, through freezes during volatility,
and through jurisdictions withdrawing service from users overnight.
This is not an argument against using exchanges. It is an argument for being deliberate about
how long a balance stays on one, and for treating “I will move it later” as a decision with a
cost rather than a neutral default.
What proof of reserves does and does not show
It shows that assets matching customer balances existed at the moment of the snapshot. It
does not show what the liabilities were, whether the assets were borrowed for the
snapshot, or what happened the following day. It is evidence, and it is weaker evidence
than the phrase suggests.
Why the withdrawal test is worth running early
Move a small amount off the platform shortly after the first deposit, while the sum is
trivial. You learn whether the process works, how long it takes and what it costs, at a
point where a problem is an inconvenience rather than an emergency.
Sending on the wrong network
The same ticker often exists on several chains. Selecting the wrong one sends funds to an
address that exists on a network the recipient does not monitor. Recovery is sometimes
possible through support and often is not, so the network selector deserves more attention
than the amount field.
Two accounts is usually the right answer
Most people end up wanting two things from an exchange that no single platform does equally
well: a straightforward on-ramp from their bank, and reasonable fees on the pairs they actually
trade. The platforms that excel at the first tend to charge for it, and the ones with the
better fee schedules often have a slower or narrower funding route.
Splitting the job removes the compromise and costs one extra transfer. It also has a side
benefit worth more than the fee saving: if one platform restricts your account, freezes
withdrawals or exits your jurisdiction, you already have a working route somewhere else rather
than opening one under pressure.
Regional availability changes without notice
An exchange serving your country today may not serve it next quarter. Platforms withdraw from
jurisdictions when licensing requirements change, and the usual sequence is that new
registrations close first, then deposits, then a deadline is set for withdrawing. Users are
normally given a window, and the window is normally shorter than people expect.
The defensive position is unglamorous: do not keep a balance somewhere you would struggle to
exit quickly, and know in advance where you would move it. That question takes ten minutes to
answer while nothing is happening, and it is nearly impossible to answer calmly during the week
an announcement lands.
Proof of reserves, and what it leaves out
Several platforms now publish an attestation that they hold assets matching customer balances,
usually as a cryptographic proof a depositor can check their own balance against. It is a real
improvement on nothing and it answers half the question.
Reserves are the asset side. Insolvency happens on the liability side, and an attestation
showing assets says nothing about what the platform owes elsewhere, whether any of the reserves
are borrowed for the snapshot, or what changed the day after. A proof covering both sides is a
different and much rarer exercise.
Treat it as one input. A platform publishing regularly, on a fixed schedule, with an
independent party involved, is telling you more than one publishing once after a competitor
failed. Neither replaces the point above: a balance on any platform is a claim, and the only
state that removes counterparty risk is holding the asset yourself.
Where the trading pages fit
Two of the pages in this section are about placing orders rather than choosing a venue. They
sit here because the venue determines what order types you have and what they cost, and
because the margin guide is the one page on this site most likely to talk a reader out of
something. Leverage arithmetic is unintuitive in a specific direction: the loss that liquidates
a position is much smaller than most people estimate.
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