People often stash away cash for use during unexpected crises. According to reports in 2024, law enforcement seized a historic record of €1.7 million in bills deemed unfit to be used in transactions.
Source: https://www.euronews.com/my-europe/2025/03/21/stash-the-cash-how-burying-money-cost-portugal-millions-of-euros-in-the-last-decade