Except that no one is going to sell you anything for such toilet paper money, banks do not offer any credits, and everything is calculated in USD or EUR that be

Except that no one is going to sell you anything for such toilet paper money, banks do not offer any credits, and everything is calculated in USD or EUR that become really, really scarce. Basically, all "official" commerce that uses worthless, hyperinflated, currency ceases, and commerce moves to unofficial grey/black market that does business in hard currency. Add to that the problem that the salary at your official job (if you have any) pays in funny money, so you have an additional problem of earning much needed USD/EUR elsewhere. This is all from experience since I lived through Yugoslavia's 1992-93 hyperinflation (fortunately, as a teenager).