Capitonationalism is simply understood thus:
if ethnonationalism is someone's residency determined by their above-minimum ownership of some specific genes,
if civicnationalism is someone's residency determined by their above-minimum ownership of some specific ideology,
if theonationalism is someone's residency determined by their above-minimum ownership of some specific religion,
capitonationalism is someone's residency determined by their above-minimum ownership of some specific capital.
What: this capital is called nationshares. Nationshares are resellable to anyone on the market. Nationshares entitle their holders to certain services: military/police protection, roads, courts, dividends of State's profits, etc. In general, the number of nationshares you own determines how much of a shareholder you are of the State. A minimum number of these nationshares, 1000, must be bought and locked away before entry into the territory is granted to anyone. There can also be a background check to make sure there's no international conflict of interest. To further avoid a domestic conflict of interest, every shareholder must have more of their wealth in nationshares than in their personal/private property. This means some of your income will have to be spent buying more nationshares to make sure that your nationshares always make up the majority of your wealth. If you have an excess of nationshares, then you can sell said excess at any time. But to sell those 1000 nationshares that are the mandatory minimum, you must first leave the country and show proof of emmigration. At that point, those 1000 nationshares will be unlocked and you can sell them on the market, and probably retire. Babies born to nation shareholders receive 1000 locked nationshares, the mandatory minimum. There are tiers of nationshares: under nationshares are stateshares, townshares, blockshares, etc. There may also come a time when multiple nations partner up and create worldshares to bind two formerly-sovereign nationshare markets together.
Why: to align the incentives of the poor, the rich, the rulers, and the ruled. To lift everyone in the nation up with the rising tide. Even if you lose your job and you can't pay your rent, your nationshares will still be worth much more than when you moved into the community. This capital appreciation allows you to cash out as a form of severance for your displacement. It also incentivizes you to make room for those who want to move in. Ironically, this also incentivizes the other nation shareholders to stop you from selling your nationshares and moving your money to another market; think: dividend income to help you afford to live nearby. The nationshare market also provides instant feedback to the government regarding its performance. The State is incentivized to cut costly programs that do not increase the market value of the nationshare. The State is incentivized to provide services for foreign customers to generate revenue for shareholders. The residents police each other; mobs have the absolute moral justification: stop someone from decrease the market value of their nationshare. Rules are simplified to one law: do that which increase the market value of the nationshares. Literally no other law matters, or is merely a means by which to fulfill that eminent law. All criminals are fined in nationshares and thus risk losing their residency status: deportation after the debt is cleared. Tourism does not get affected because nationshares can just be leased from tourist agencies who sponsor tourists for a profit in exchange for the risk and cost of a criminal tourist.
How: Small scale testing, cryptocurrency smartcontracts that keep automatic track of every keyholder's balances.
Who: North Korea's dictator may implement capitonationalism. He benefits from doing so because he will have a large portion of the nationshares and his military might will be converted into economic might. All without being in danger of his citizens revolting since they will own the same nationshares that he and his generals and his armies do.
Where: A single State at first, NK or a drug cartel or a middle eastern force. Then, other States will follow out of greed.
Further reading: r/capitonationalism, r/shareholdernation