If an ATM is down, it's down. With Bitcoin you can still use mesh networks. Here's an old article about an example: https://bitcoinmagazine.com/culture/samourai

If an ATM is down, it's down. With Bitcoin you can still use mesh networks. Here's an old article about an example: https://bitcoinmagazine.com/culture/samourai-and-gotenna-enable-bitcoin-transactions-without-internet-access https://bitcoinmagazine.com/culture/samourai-and-gotenna-ena... (Samurai wallet is defunct, but the principle holds up)