Not sure what you mean by that? Russia would just nationalize the assets. What would US do about it, if they are not willing to do anything so far? The ownership in this fund would just be nice to have, not make it worth going for Russia then any more than now. And in any case Russia could just make an offer to share the minerals themselves, which they already did. It wouldn't make a difference to US.
> Russia wakes up and decides not to proceed with step 3. to 6., because the downsides of taking over a country (insurgency, tons of explosives everywhere, new huge portions of population on expensive welfare and healthcare, ...) aren't worth it without any of the upsides.
Historically Russia has repeatedly demonstrated willingness to harm their economy in return for gaining more territory.
This deal is worthless in terms of deterring Russia, if Russia is not deterred currently, this deal is not going to make a difference.
The most important thing to Ukraine is - how can we make sure that Russia doesn't invade us again. Everything else is worthless for Ukraine, for the West, and for Democracy.