You can borrow against crypto without selling by locking it as collateral in a lending protocol and taking out a loan in a different asset, usually a stablecoin. Your coins stay in a smart contract, you get spendable cash, and you keep the upside if prices rise. You have also just opened a leveraged position, whether you think of it that way or not.
How collateralized crypto loans actually work
You deposit ETH, BTC, or another accepted asset into a protocol like Aave. That deposit becomes collateral. Against it, you borrow USDC, and the protocol tracks a loan-to-value ratio in real time.
Two numbers decide whether you sleep well tonight. Your LTV is how much you've borrowed relative to your collateral's value. Your liquidation threshold is the LTV at which the protocol starts selling your collateral to repay the debt. Different assets carry different thresholds, and they change.
Interest accrues on the borrowed amount, not the collateral. On stablecoin loans, rates float with utilization — how much of the pool's liquidity is currently borrowed out. When lots of people are borrowing, rates climb. That's not a bug; it's how the pool stays solvent.
Why the collateral stays yours (mostly)
You don't sell, so you don't trigger a taxable disposal in most jurisdictions. That's the headline appeal. You also keep exposure to the asset's price. If ETH doubles, your collateral doubles in value while your debt stays fixed.
But "yours" has an asterisk. The protocol can liquidate your position without asking. That's the trade.
The liquidation math that catches people off guard
Here's the scenario. You deposit $12,000 of ETH and borrow $6,000 in USDC. That's a 50% LTV. Feels conservative.
Now ETH drops 30%. Your collateral is worth $8,400. Your debt is still $6,000 plus accrued interest. Your LTV just jumped to roughly 71%. If the liquidation threshold sits near 80%, you're a bad week away from a forced sale — and you never sold a thing.
That's the mistake: people size loans against today's price and forget that collateral value moves. A 50% LTV isn't "half safe." It's a bet that your collateral won't fall far enough to breach the threshold.
Health factor, in plain terms
Most protocols display a health factor instead of raw LTV. Above 1.0, you're fine. At 1.0, liquidation begins. The further above 1.0, the more buffer you have. Watch this number more than your loan balance.
What liquidation actually costs you
Liquidation isn't free. You typically pay a penalty on top of losing the collateral, and the process can happen in a single block during volatile markets. No phone call. No grace period.
Ways to reduce the risk without selling
You've got levers. Use them.
- Borrow less than you could. If the protocol allows 75% LTV, staying under 40% leaves real room for drawdowns.
- Add collateral before you need to. Topping up early is cheaper than topping up during a crash, when everyone's doing it at once.
- Repay partially. Even a small repayment drops your LTV meaningfully.
- Pick stable collateral pairs. Borrowing a stablecoin against a volatile asset is the standard setup; the reverse gets messy fast.
- Set alerts. Price alerts at levels well above your liquidation point give you time to act.
Aave shows your health factor prominently and supports multiple collateral types, which makes it a common starting point. The tooling doesn't remove the risk, though. It just makes the risk visible.
Comparing the two paths
| Factor | Sell the crypto | Borrow against it |
|---|---|---|
| Taxable event | Usually yes | Usually no at loan time |
| Price upside | Given up | Retained |
| Liquidation risk | None | Real and continuous |
| Ongoing cost | None | Interest accrues |
| Complexity | Low | Moderate to high |
Neither column wins outright. It depends on why you need the money and how long you can wait.
When borrowing against crypto makes sense — and when it doesn't
It fits when you need liquidity for a defined period, you're confident in the collateral's medium-term direction, and you can service the interest. It fits less well when you're borrowing to buy more crypto, because that stacks leverage on leverage.
Don't borrow against an asset you'd panic-sell anyway. If a 40% drawdown would make you miserable, the loan just adds a liquidation timer to that misery.
Interest is the quiet cost
Stablecoin borrow rates move around. Over months, even a modest rate adds up, and variable rates can spike when the pool gets tight. Budget for the rate rising, not falling.
Frequently asked questions
Can I borrow against crypto without selling and still keep the coins?
Yes, in the sense that you retain ownership and price exposure. The collateral sits in a smart contract rather than your personal wallet, and you can't move or spend it while it backs a loan. Once you repay, you withdraw it. Until then, the protocol controls whether it stays put.
What happens if my collateral price falls too far?
The protocol liquidates part or all of your collateral to repay the debt, usually with a penalty added. This can happen automatically and quickly during volatile markets. You don't get a warning call, which is why monitoring your health factor matters more than checking your loan balance.
Is borrowing against crypto taxable?
Taking a loan generally isn't a taxable disposal in many jurisdictions, since you haven't sold the asset. That said, tax treatment varies by country and by what you do with the borrowed funds. Talk to a tax professional about your specific situation rather than assuming.
How much can I safely borrow?
There's no universal number, but borrowing well below the maximum LTV gives you a buffer against price swings. Many experienced users stay under half of what the protocol permits. The right figure depends on how volatile your collateral is and how quickly you could add funds if needed.
Check your current health factor before you do anything else today — and if it's under 1.5, either repay a little or add collateral before the market decides for you.