You are right about the person itself.
But their assets are often hard to move.
I just dont think that rich people in general have an interest in a (serious) war.
I rather think conflicts are used to distract from other problems and create "unity". But not with the goal to make money.
Obviously some peope will try to profit from it while its going on and some will also lobby for new ones. I just dont thinks that this influence is that big
Borders do not apply to very rich people.