Only run wallet?
No sorry, CAIx is 100% PoS which means you can only mine it if you have CAIx in your wallet. No hardware mining after the 18th on CAI, all miners will have to mine at the multipool for CAIx if they want to use hardware. Then they can get paid in CAIx and mine on wallet as well, by leaving it open.
It sure is 100% POS, but why shouldn't there be a multipool if it is? A multipool just mines the most profitable coin atm and buys CAIx with the income of mining that most profitable coin... Hasn't got anything to do with CAIx being POS ony.
There will be a multipool. I do not know why you got the impression there won't. I have spoken about moving miners to a profit switching multipool before. It seems in the midst of everything happening that got lost in translation. We said the multipool will not be our only revenue stream to support CAIx but it will sure be there.