When a wave of bitcoin lenders collapsed in 2022, taking billions of dollars of customer crypto with them, the cause was not the bitcoin price. Bitcoin fell hard that year, but a falling price alone does not bankrupt a properly run lender. What sank Celsius, BlockFi, Voyager, and Genesis was what they were quietly doing with customer assets behind the scenes: reusing them, lending them into risky bets, and holding them in opaque, commingled pools. When the bets went bad, the customers' bitcoin went with them.
That is why custody, where your bitcoin is held during a loan and whether the lender can reuse it, is the risk that deserves as much attention as the interest rate, and usually gets far less. This guide explains what custody actually means in a bitcoin-backed loan, what rehypothecation is and why it was the hidden fault line in 2022, the spectrum from holding your own key to handing everything to the lender, and exactly how to vet a lender before you pledge a single satoshi. We are a comparison publisher, not a lender, and the per-lender custody facts below come straight from our database.
You hold a key (collaborative multisig)
No single party can move the collateral alone. Closest to self-custody.
Qualified custodian
A regulated third party holds it, segregated from the lender.
Lender-held (segregated)
The lender holds your bitcoin, but does not reuse it.
Lender-held + rehypothecated
The lender holds your bitcoin and may re-lend or reuse it.
What custody means in a bitcoin loan
When you take a bitcoin-backed loan, you pledge bitcoin as collateral, and that bitcoin has to be held somewhere for the term of the loan. Who holds it, and under what rules, is the custody model, and it is the single biggest factor in your counterparty risk, the risk that something happens to the lender rather than to the price.
There are a few broad arrangements, and they are not equally safe:
- You hold a key (collaborative multisig). Control of the collateral is split across multiple keys and you hold at least one, so no single party can move it alone. This is the closest a loan gets to self-custody.
- A qualified custodian holds it. A regulated third party holds the bitcoin, segregated from the lender's own funds, so a lender failure does not automatically put your collateral in the bankruptcy pile.
- The lender holds it. The lender keeps your bitcoin in its own custody. Simplest to operate, but it concentrates trust in the lender, and the details of how it is stored and whether it is reused matter enormously.
The difference between these is the difference between a risk you can manage and one you cannot. A price-driven margin call is something you can prepare for. A lender quietly losing your collateral is not.
Rehypothecation: the practice that sank the last cycle
Rehypothecation is a word worth learning, because it is the difference between a lender holding your bitcoin and a lender using your bitcoin.
In plain terms, rehypothecation is when the lender takes the collateral you pledged and reuses it while your loan is open, typically by re-lending it to a third party to earn yield. The practice exists in traditional finance, where it is capped and regulated. In the last crypto cycle it was neither. Platforms reused customer deposits to chase yield, often without clearly disclosing it, and routed the proceeds into uncollateralized loans and leveraged bets.
Then 2022 happened. After the Terra collapse in the spring, the dominoes fell: Celsius, BlockFi, Voyager, Genesis, and Hodlnaut froze withdrawals and filed for bankruptcy between May and November, and well over $10 billion of customer assets was caught in the wreckage. Celsius alone froze roughly $4.7 billion. The borrowers and depositors had no idea their assets were being reused until the assets were gone. The lesson the surviving industry took, and that you should take as a borrower, is that reused collateral is collateral you can lose for reasons that have nothing to do with the bitcoin price or your own LTV.
Lender facts on this page render live from our comparison database, last verified June 12, 2026. Figures refresh weekly; for the current set and your own loan size, see the comparison tool.
Where today's lenders hold your bitcoin
The lenders operating now are, broadly, the ones that learned the 2022 lesson, but their custody models still differ, and the differences matter. Here is how each active lender we track holds collateral, grouped by model, with a plain-English description of what each one means. This renders live from our database, alphabetical within each group, so it ranks no lender.
A multisignature arrangement where you hold one of the keys, so no single party can move the collateral alone.
Collateral sits with a regulated custodian, segregated from the lender's own funds.
The lender holds your bitcoin directly, with no third-party qualified custodian. Convenient, but the safety depends on the lender's own practices and solvency.
The pattern to notice is that custody is a spectrum, not a yes or no. A collaborative-multisig setup where you hold a key sits at one end; a lender holding everything in its own wallet sits further along; and a lender that also reuses what it holds sits at the far end. None of these is automatically disqualifying, but they are not the same deal, and the cheapest rate often comes from further down the spectrum.
Who reuses your collateral, and who does not
Because rehypothecation is the specific failure mode behind the last collapse, it is worth isolating. Below, the same active lenders split by whether they reuse your collateral. A lender that does not rehypothecate removes the exact risk that sank the 2022 platforms; a lender that does is not necessarily reckless, but you are taking on more counterparty exposure for it, and you should be paid for that in a better rate or know why you are not.
Collateral is not re-lent or reused. The failure mode behind the 2022 collapses is removed.
If a lender will not say plainly whether it reuses your collateral, treat the silence as a yes until proven otherwise. Transparency here is itself a signal: the lenders that learned from 2022 tend to advertise their custody and no-rehypothecation stance, because they know it is now a selling point.
How to vet a lender's custody
Before you pledge bitcoin, get clear answers to these. A trustworthy lender will have them ready:
- Who holds the collateral? A named qualified custodian, a multisig you participate in, or the lender itself. Vague answers are a red flag.
- Is it segregated? Your bitcoin should be held separately from the lender's own assets, not commingled in one pool.
- Is it rehypothecated? Ask directly whether your collateral is re-lent or reused while the loan is open, and get it in writing.
- Do you hold a key? Collaborative custody removes the single point of failure. If it is offered, understand how it works.
- What proof and insurance exist? Proof-of-reserves attestations and genuine custody insurance are positives; "trust us" is not.
- What is the track record? How the lender communicated and behaved in past volatility tells you how it will behave in the next drawdown.
You can shortcut some of this with our reviews and the no-rehypothecation comparison, which track custody and rehypothecation per lender.
Custody is not the only risk
Getting custody right removes one major way to lose your bitcoin, but not the others. The price-driven risk, a margin call or liquidation when bitcoin falls, is separate and just as real, and it is the one you manage with a low LTV rather than by picking a custodian. For the full picture of every risk and how they fit together, see are bitcoin loans safe? and compare current lenders, including their custody models, on our comparison tool.
This is not financial advice
borrow/on/bitcoin is a comparison publisher, not a lender, broker, or financial advisor. Custody arrangements, rehypothecation policies, and insurance vary by lender and can change, so verify the current terms directly with each lender before you borrow. A bitcoin-backed loan carries real risk, including the loss of your collateral, and no custody model removes that entirely.