EVERYONE should have one of these - using cash should be something everyone is doing to assist with privacy.
I know it's tough--going out with friends to a restaurant will still get funny looks when I pay in cash (but most have gotten used to me doing it).
Yes, it's fiat, but *anything* you can do to help preserve your privace is imporant - and that includes paying with cash.
(Off my soapbox...)
Cash is the only self-custodial fiat. You can say that doesn't matter, it's still fiat. But it does matter, because it protects you from significant risks, and holding cash weakens the fractional reserve banking system and accelerates the collapse of the fiat scam.
Everyone should make an effort to hold their emergency savings, 3-6 months at least, in physical cash. Keep the bare minimum required for transactions in the banking system, and of course long term savings in self custodial Bitcoin.
Amen--couldn't have said it better myself...
