Lesson 5 of 17Beginner8 min
How does selling crypto options work?
Selling an option means taking the premium now in exchange for a duty: to buy or sell at the strike if the buyer uses the right. The seller profits when the option expires worthless and keeps the whole premium. The risk is the other side: on a fast coin like Bitcoin, losses can grow far beyond that premium.
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Step 1 of 2
The other side of the deal
Someone sells every option that someone buys. The seller receives the premium today and takes on a duty: to buy or sell at the strike if the buyer asks.
Here you sold a put below the price. As long as Bitcoin stays above the strike, you keep the whole premium.
Think of it like this. You are the insurance company now. You collect the premium. Most weeks nothing happens and you keep it. Some weeks there is a claim.
Profit or loss if the price is 84,796(your target)
| Date | Profit / loss |
|---|---|
| On target dateFri, 2 Oct | +12.3profit |
| On expiry dateFri, 2 Oct | +12.3profit |
Move over the graph to read any price; tap or click to set it as the target.
- The 83,000 put is worth nothing at 84,796 (the price is not below the strike).
- You received 12.31 USDT for selling it.
- Result: +12.31 USDT.
Step 2 of 2
Where the loss has no floor
Above the strike your profit is flat: the premium, no more. Below it the loss grows with every 1,000 the price falls, and there is no floor until zero.
This is why a sold option always needs a stop or a hedge. Lesson 11 shows the hedge.
Profit or loss if the price is 77,240(your target)
| Date | Profit / loss |
|---|---|
| On target dateFri, 2 Oct | −45.3loss |
| On expiry dateFri, 2 Oct | −45.3loss |
Move over the graph to read any price; tap or click to set it as the target.
- The 83,000 put is worth 5,760 per BTC (83,000 − 77,240).
- On 0.01 BTC that is 57.60 USDT.
- You received 12.31 USDT for selling it.
- Result: −45.29 USDT.
You sold a put and received 5 USDT. What is the most you can make?
Answer the quick check to finish. Your progress stays in this browser.
Next: Time: why the same option is cheaper on ThursdayKey terms
- Option seller
- Receives the premium and takes on the duty. Also called the writer.
- Credit
- The premium received for selling.
- Naked option
- A sold option with no hedge behind it.
- Margin
- Collateral the exchange holds against a sold option's open risk.
Questions people ask
Is selling Bitcoin options profitable?
Sellers win more often, because most out-of-the-money options expire worthless. But the losses when they lose can be large, so the result depends on risk control, not on the win rate.
Why do option sellers need margin?
Because their loss is not capped. The exchange holds margin as collateral against that open risk; buying an option needs only the premium.
How do crypto option sellers limit their risk?
With a stop loss that closes the trade at a set loss, or a hedge: a further option bought to cap the loss. A sold option plus a bought one is a spread.
Why sellers win often and lose big
Time works for the seller. Every hour without a big move, the option loses value and the seller moves closer to keeping the premium. That is why selling feels steady most weeks.
The catch is the shape of the loss. The gain is capped at the premium, while the loss keeps growing as Bitcoin moves through the strike. One sharp crypto move can undo many good weeks.
Selling puts and calls on Bitcoin
A sold put profits if Bitcoin stays above its strike; a sold call profits if it stays below. Selling both, a put below and a call above, is a short strangle: income while Bitcoin stays in a range. With daily expiries, many crypto sellers do this every day.
Seller rules worth keeping
Size so the worst case is survivable. Decide the stop before the trade. And prefer spreads while learning: the bought wing caps the loss for a small part of the premium.
Written by the Algoclear team · Updated 22 September 2026 · Examples use Bitcoin options on Delta Exchange India.
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