"a period of civil disorder in Albania in 1997, sparked by Ponzi scheme failures. The government was toppled and more than 2,000 people were killed" .. "By January 1997, Albanian citizens, who had lost a total of $1.2 billion—the population being only three million—took their protest to the streets"

There are now reports of people taking out mortgages or HELOCs to buy bitcoin. That is a disaster waiting to happen - it was bad enough when the mortgages were underwater because they'd been invested in houses which lost value, but bitcoins can potentially fall a lot further. Or be easily lost entirely.