How is Piggy a commitment device?

If you empty your Piggy completely, it dies permanently. The creature, the name, the personality are gone and cannot be recovered. That consequence exists to make you stop before draining your savings to zero. Partial withdrawals are fine. Only a full withdrawal kills it.

Why not just use willpower to save?

Because the decision to spend happens in a moment, and the benefit of saving is months or years away. Commitment devices work by making the short-term cost of breaking feel real, not abstract.

Can I still access my Bitcoin if I need it?

Yes. You can withdraw some of your sats without killing your Piggy. The death mechanic only triggers when the balance hits zero. It is designed to prevent casual drain, not block emergencies.

Do other Bitcoin wallets do this?

No. Most wallets treat every transaction equally. There is no concept of a consequence for emptying them. Piggy is the only wallet where the act of going to zero is irreversible and permanent.

What Is a Commitment Device?

Q: What is a commitment device?

Something you set up in advance that makes it harder to go back on a decision. A term deposit that charges a penalty for early withdrawal is one. A gym membership you prepay for the year is one. Anything that adds a real cost to quitting.

A commitment device is something you set up now that makes it painful to break a promise later. You build the cost in advance, before the temptation shows up, because you know you will not make the right choice in the moment.

A term deposit is a commitment device. So is a prepaid gym contract. So is telling five people you are quitting smoking. They all do the same thing: attach a real, immediate consequence to the act of giving up.

Why Piggy is one

Piggy is a Bitcoin savings wallet with a creature that has a name and a personality. The personality is generated once, from a unique combination of traits, and it stays the same forever. When you feed your Piggy sats, it reacts. When you talk to it, it responds in character. Over time it becomes a specific thing that only exists inside your wallet.

If you empty your Piggy completely, the creature dies. The name is gone. The personality is gone. The conversation history is gone. You get your sats back, but the Piggy itself is permanently destroyed. There is no recovery, no undo, no second chance.

This is the commitment device. Not a fee, not a timer, not a lock screen. A loss. Something you built over weeks or months of feeding and talking, erased because you took everything out.

Partial withdrawals do not trigger it. You can take sats out whenever you need to. The death only happens at zero. The mechanic is not designed to trap your money. It is designed to make the specific act of draining your savings to nothing feel like it costs you something, even though financially you got every sat back.

What this solves

A normal Bitcoin wallet has no friction around spending. You open it, sign a transaction, and the sats are gone in seconds. The blockchain does not know whether those sats were savings you meant to keep for five years or pocket change you are spending on coffee. It processes both the same way.

For payments, that is the right design. For savings, it is the wrong one. If your long-term savings sit in the same app with the same send button and the same zero-friction flow as everything else, the barrier between "savings" and "spending" is a label. Labels do not hold when the rent is late or the thing you want is on sale.

Banks solved this decades ago with term deposits and penalty fees. Retirement accounts solved it with tax penalties for early withdrawal. The pattern is old: make it cost something to break, and fewer people break.

Bitcoin wallets never had an equivalent. Piggy's death mechanic is one. The cost is not financial. You get every sat back. The cost is that a creature you named and spent time with no longer exists. That turns out to be enough to make people pause, which is the entire point.

Try it

What Piggy is and how the death mechanic works
Stacking sats as a savings habit
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