I understand the sentiment, but PGP keys are designed to go expired after a certain amount of time, and that's because cryptographic signature/encryption algorithms _will_ expire after a certain amount of time, as someone may find an attack in the intervening time period.


So, the above image lists the issues with Satoshi's key.

• 1024 bit (not large enough to be safe for more than 10 years)
• DSA (not a modern signing standard
• Created in 2008 (long enough to throw some big computing power to discover the private key)

PGP keys are different to Bitcoin keys, you're supposed to renew the key every few years to mitigate against someone bruteforcing the key, and if you somehow leak your private key, you need to be able to replace that with a new one (and you need to be able to do that so in a way where everyone actually believes it's you that's decided to replace it, and not someone impersonating you)

With Bitcoin keys, these problems don't exist because of Bitcoin addresses. Bitcoin addresses hide the actual cryptographic keys (locked inside a hash) until you spend from them.