Pretty sure if you have your money tied into bitcoin, as the people above suggest as the killer use of BTC, then having your internet cut off easily becomes your biggest problem.

How else are you gonna spend your crypto to buy food or pay for shelter or pay for travel or smugglers to get you out of the country?

Crypto would be great if it could be used 100% offline, like tap your phones via NFC, and boom, coins transferred, here's your bread.