Yugoslavia (and Argentina, Greece, Zimbabwe, pre WWII Germany, etc.) had
debt in another country's currency. Yugoslavia's debt was denominated in U.S. dollars - you cannot print your way out of that kind of debt trap by printing dinars.
Yugoslavia's GDP in 1980 was above $100 billion dollars - their debt of $20 billion should not have been a problem (~20% of GDP), had it been denominated in dinars.
@neroden's point is that
national debt in your own currency is generally not a problem:
- Great Britain had 300% GDP worth of national debt after the war, denominated in the pound sterling, and handled it without a debt crisis or hyperinflation.
- The U.S. had 120% of GDP worth of national debt in 1946 and grew out of it without a debt crisis or hyperinflation.
To get back on topic: if Tesla's ~$10b long term debt was denominated in 150,000 Tesla Model 3's, two quarters of production at 5k/week, it would be a lot harder to FUD about it, right?