The address you refer hasn't made an outgoing transaction since 2010, but it's strange that there are a lot of articles about THIS ADDRESS.

The message you posted seems to be a spamming driven by the necessity (maybe) to increase your account activity. As the others above me said, send a signed proof so it's up to everyone to check with the public key.

Guys don't give your trust to this guy for a mirage.

I leave here a lot of material found on the web about this address.

Reddit: https://www.reddit.com/r/Bitcoin/comments/46nmsk/address_to_public_key/
Fun article: https://bitcoinreport.blogspot.com/2011/05/bitcoin-top-100-rich-list-27th-may-2011.html
Index of articles: https://allprivatekeys.com/btc/12ib7dApVFvg82TXKycWBNpN8kFyiAN1dr
PrivateKeys.pv : https://privatekeys.pw/address/bitcoin/12ib7dApVFvg82TXKycWBNpN8kFyiAN1dr
Coingeek: https://coingeek.com/craig-wright-hack-could-see-bitcoin-rights-settled-in-court/