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The privacy risks of CBDCs

Cash leaves no trail. A badly designed CBDC could record every coffee you ever bought. Here's what's actually at stake.

Central banks say their digital currencies will respect privacy. Many of them mean it. But a CBDC is a system, and systems can be changed. These are the risks critics point to.

1. Every payment, on record

With cash, nobody knows what you bought. With a CBDC, every transaction passes through a system that could log it. Even if today's rules limit who can see the data, the data exists, and rules change with governments.

2. Programmable money

A CBDC can be coded with conditions: money that expires if you don't spend it, can't be used for certain products, or only works in certain places. Supporters say this enables useful things like targeted benefits. Critics see a tool that could control behavior.

3. Holding limits

Several designs cap how much CBDC one person can hold, to stop people moving all their savings out of banks. That's a sensible banking concern, and also a hard ceiling on your own money.

4. Freezing with one click

When money lives in one state-run system, freezing someone's funds becomes trivial. That's useful against criminals, and dangerous against protesters, journalists and anyone who ends up on the wrong list.

5. The end of cash, by drift

If shops stop taking cash and everything moves to digital, a CBDC could become the only practical public money. Nobody has to ban cash for that to happen.

What actually protects you

Cash. Use it, and support laws that keep it legal tender.
Strong privacy rules in law, not just in a central bank's promises.
Private crypto like Monero, which no central bank controls.
Services that don't collect what they don't need, like apps that work without email or KYC.

FAQ

Will CBDCs track my spending?

It depends on the design and the law. The technology makes it possible, which is why the rules around it matter so much.

Can a CBDC be private?

Some designs promise cash-like privacy for small or offline payments. How private they really are will depend on the details.

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