Russia is basically bankrupt. They need to be a part of the global picture. That's their incentive and Putin isn't getting any younger and what better legacy than ensuring the future of his country? Certainly not squabbling over who's entitled to part of something that someone 1500 years ago said their cousin could have.
As to the mineral deal, that's a means to recoup some of the trillion dollar black hole in the US budget. Obviously the investment on infrastructure afterwards will need protecting and that's the link to ending the war and maintaining some sort of civility.
No it's not. Russia is happily selling oil and gas to China, India and..... Europe! European countries spent more on Russian oil and gas last year than they did on aid to Ukraine!

Anyway, peace will just as likely bankrupt Russia, as a large proportion of it's industry has been turned over to the war effort, which has been sustaining their economy.
That said, the Russian economy is obviously not booming with high inflation and punishing interest rates, but I saw plenty of Russian families on holiday in Vietnam and Thailand when I was there a few weeks ago, so things can't be that bad. There were also lots of young and youngish Russian men there.... for obvious reasons.
