I doubt it will get done. Perhaps in a post-quantum world someday. But not by the end of the year and I think he knows that.
That would involve a hack to PGP (from what I understand... please correct me if I'm wrong) since that is what he is using to encrypt both his private and public keys.
I am not a fan of asset-backed stablecoins in the crypto space. I think the algo ones that actually have some rigor behind them (DJED and SigmaUSD) are pretty cool, but I could see people being scared off ever since the Terra Luna thing (which did NOT have any rigor behind it and actually had a back door).