I'm sure he could refer a lifetime's worth of Trump financial crimes to the SDNY and hope he would do that but not sure he will. Or he'll hedge it to let Congress make that determination based on his recommendation.
I'm starting to think more and more that the focus for Mueller will be 1) on the conspiracy/attempted conspiracy by Team Trump (but perhaps not much from Trump himself) particularly related to the Trump Tower meeting and 2) the cover-up/obstruction actions taken by Trump himself. That will probably uncover the family's ties to illegal Russian financing and how the support for his presidency came about. I don't think Team Trump masterminded much of anything, because they're mostly fecking idiots, but were rather given the opportunity to make use of Russia's efforts by the likes of Agalarov and Goldstone. Jr/Kushner/Manafort and probably the likes of Cohen, Rohrbacher, and maybe Sessions would have been involved on that side of things.