What to Know Before You Borrow Against Bitcoin, Part 1: Custody

Before you borrow: the three questions

Most borrowers compare the headline rate and stop. These are the three things that actually decide how a Bitcoin-backed loan goes for you:

1. Custody — where your collateral sits, whether it's pooled with everyone else's, and who can move it.
2. Rates and fees — the number you were sold versus the cost you actually carry.
3. LTV and liquidation — the one number that decides whether you keep your Bitcoin.

Read them in order, or jump to the one you haven't asked about yet. This is Part 1.

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The market wasn't empty for lack of demand

The Bitcoin credit market looked empty for years. Everyone read that as "Bitcoiners don't borrow."

Wrong. They didn't borrow because every option asked them to stop being Bitcoiners.

Look at what borrowing against your BTC used to cost you:

• Custody - hand your coins to someone else.
• KYC - surrender the privacy you hold Bitcoin to protect.
• Wrapping - turn your BTC into an IOU that isn't BTC anymore.

Every path asked you to give up the thing.

So Bitcoiners did the rational thing. They didn't borrow. Not because they didn't want credit, everyone wants liquidity without selling but because the price of that credit was your principles, and that's too high.

This is the mistake outsiders make about an empty category. They see no volume and conclude no demand. Sometimes that's right. Sometimes the category is empty because nobody built the product the market would actually accept.

The tell is in the trade. If a category is empty because there's no demand, lowering the price does nothing. If it's empty because the product is wrong, the demand shows up the moment someone stops asking people to betray why they're here.

🚨 The category was never empty for lack of demand. It was empty for lack of a product that respected the borrower. 🚨

If borrowing against your sats feels like betraying why you hold them, that's not the deal. Keep looking.

So start with the first real question

"How exactly do you custody my Bitcoin?"

Ask your lender, if you're borrowing against your sats. If the answer is a brand name, a license number, or "trust us, we're insured", you don't have an answer. You have marketing.

Most lenders are black boxes. You hand over coins, they hand back dollars, and what happens in between is a vibe. The landscape, roughly:

• Some self-custody under their own license
• Some outsource to a third-party custodian
• Some pool collateral in cold storage you can never see
• Very few put it on-chain in a multi-sig you can verify
• Almost none give you a unilateral exit

Bitcoin is digital. You don't have to take anyone's word for where it sits.

Then ask the follow-up almost nobody asks

Is it in a pool, or is it yours alone?

Most custodians pool collateral. Cold storage, hot wallets, institutional custody, multi-sig, the model varies, but the pattern doesn't. Everyone's BTC lands in a handful of addresses. It's operationally simpler. That's why it's the default.

Here's what pooling actually buys the attacker: one target, everyone's coins.

Break the pool once and you don't take one borrower's collateral. You take all of it. The work to compromise 1 borrower and 1,000 borrowers is the same work.

Segregated collateral inverts that math. Your BTC sits in your own vault, under your own conditions. An attacker doesn't get a payday for one break. They get one position and then they have to do it all over again for the next one. And the next.

Blast radius: one.

And remember the collateral math. At 50% LTV, the pool holds roughly 2x the dollars it secures. A pooled honeypot isn't sized to the loans. It's sized to the collateral behind them, which is always the bigger number, and the more attractive one.

Nobody asks this question because it doesn't matter until it does. Pooled and segregated look identical on a dashboard on a good day. The difference only shows up in the worst scenario, which is exactly when you'd want to have asked.

The playbook

Ask your lender whether collateral is pooled or segregated per credit line. Then ask to see it on-chain.

If the answer is a pool, you're not just underwriting your position. You're underwriting every other borrower's security too.