Excellent points. I like your analogy of economic power to nuclear power.
We've already seen Musk throwing his economic weight around like a nation, threatening to turn Starlink on and off over war zones based on his own needs, and not the national security of any of the nations involved.
When Sociopathic Oligarchs with Hoarding OCD, start accumulating such economic power that they can compete with nations, then they have reached their limit. It will only get worse, as more and more of them start negotiating their own deals, possibly to the detriment of the very nation of which they are a citizen.
Then it's only a matter of time before these Oligarchs start building private Armies, and then form alliances that can really throw their weight around. Or worse, start wars with each other over private beefs, that catch innocent citizens in their crossfire.
These things are easily predictable, if something isn't done to blunt the power of these out-of-control fortunes. Otherwise, we will be sitting here in the not-so-distant future, wondering why we didn't do something about these psychopaths when we had the chance.