Imagine if some really important country in the "world of second citizenships" suddenly decides to sell a certain number of passports for a lot of money.
Would people buy them? Would you buy, e.g. Swiss citizenship for ten million Swiss francs if it was for sale, in return for a strong passport and visa-free access to many important countries?
Having in mind that many developed countries do have financial issues, maybe this is not as impossible as it sounds.