because it's a useless problem to solve. The affected person going "FBI help me please" is the definition of that 'Bike Fall' meme. The answer to these situations is, use a currency where you can call someone that can roll your transaction back.
That’s one answer. But the question also applies to non-cryptocurrency uses of cryptography where you need to guard your private keys (like identity) — ie how to best enable people to use their keys while keeping them safe and also allowing for some form of recovery.
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