In principle the same applies to paper money, too (if power is out for more than a few days). Currencies by their very definition don't have intrinsic value oth

In principle the same applies to paper money, too (if power is out for more than a few days). Currencies by their very definition don't have intrinsic value other than as a means of exchanging goods and services. Some might be backed something that has a perceived real-world value but even in that case we're usually talking about precious metals, which themselves don't have any intrinsic value either.