[sjducb]

Currencies rarely collapse instantly. You've usually got months to years of warning. Lots of time for people to get their cash out.

If you were Lebanese I would argue that having a bank account was a silly thing to do. Foreign bank accounts were illegal/difficult and domestic bank accounts are now worthless. You could own crypto or some kind of real good, such as a warehouse full of a commodity like wheat or diesel. Those are your options for hanging on to your wealth.