What you are actually hedging
Spot BTC in a wallet, coin on an exchange, a long perp, or miner-like inventory all have different operational risks. An option hedge only addresses price (and vol) on the contract’s index. It does not fix withdrawal freezes, custody bugs, or perp funding.
Name the inventory and the unit. Hedging inverse coin exposure with linear USDT puts (or the reverse) leaves a translation residual.
Protective put
Long inventory plus long put: you pay premium so that below the strike the put’s intrinsic offsets a large part of the spot drop (European cash-settled puts pay in settlement terms, they do not magically deliver coins). Above the strike you still own the coins and you have spent the premium.
OTM puts are cheaper and protect less. ITM puts behave more like selling some of the stack. Tenor should cover the period you actually need protection — see how-to-pick-an-expiry.
Put spread: cheaper, capped
Long higher-strike put, short lower-strike put. You cut premium by selling a further OTM put. Protection stops at the short strike. In a crash through both strikes you are only hedged across the width. That is often acceptable for a budget hedge; it is not a floor under all outcomes.
Credit from the short put is not free: you now have a short-put risk if you are not actually long the underlying in matching size.
Collar: sell upside to buy downside
Long spot, long put, short call. The short call finances the put and caps rally participation. Useful when you must hold coins but can tolerate a ceiling. Painful when BTC rips and you have sold the call too close.
Call overwriting into a squeeze is a classic way to turn a hedge into a regret. Skew often makes OTM puts expensive versus calls — that is information, not a bug. See risk-reversals and collars-and-synthetics.
Where it fails
Wrong index, wrong settlement currency, illiquid wings at 3am, venue liquidation of the hedge while spot still sits in a wallet, and “I sized the put as 1 contract because it looked cheap.” Also: IV crush after the feared event if spot barely moved — insurance can expire as a decaying asset even when you were “right to worry.”
GEX and walls might describe where dealer hedges cluster; they do not replace your own strike choice.
Practice this on OptionsMatch
Compare put marks on /t/btc/chain, skew on /t/btc/skew, payoff in /t/btc/strategy. Then Match: /venue and /compare for venues that list liquid BTC puts you can actually access. Execute only on the venue.
Educational hedge mechanics — not a recommendation to buy puts.