Crypto Infrastructure
Nobody sets the price. An exchange just gets everyone into one place.
Section 5 was about holding and protecting. This is where the buying and selling happens: a marketplace that brings both sides together and pools their liquidity. It is not a wallet, and it decides nothing about what anything is worth.
The problem
You want to buy bitcoin. There is no exchange.
So find a counterparty yourself. Press through it and count who you end up trusting.
Buying from a stranger
PEOPLE YOU TRUST 0 DAY 0No marketplace, no pooled buyers and sellers. Press Post your ad.
Nothing there was unusual — that is simply what buying from a stranger costs. You had to find a counterparty, price the trade against nothing, and put trust in four separate parties, any one of which could end it. The exchange did not conjure a seller out of nowhere. It had already gathered them, and their capital, into one pool, so the match took a moment and you never met the person on the other side. Aggregating counterparties and liquidity is the product.
One line on the other half, then move on: what you just bought is now sitting with the platform, which is a custody question rather than a trading one — Section 5, lesson 05.4 covers custodial versus non-custodial in full.
The definition
Three things the marketplace actually does.
Tap each card for what sits behind the claim.
Hands on
Its job, or not its job?
Five things people expect from an exchange. Tap each one and see which bin it lands in.
Accounts you can pay into and withdraw from
THE EXCHANGEThree core functions, and two things that belong somewhere else entirely.
The bridge
From two sides to a price, and out again.
Four stages, and the last one is where the exchange hands over.
That is the whole of it: a marketplace, a pool, and a price that comes out of the pool rather than out of anyone’s decision. What it does not yet explain is how a single order turns into a trade at a particular number — which is exactly what the next lesson takes apart.
Check yourself
Five questions.
Answers come straight from this lesson. Submitting completes it.